Quarterly report pursuant to Section 13 or 15(d)

Equity and Long-Term Incentive Compensation Plans - Equity Incentive Program (Details)

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Equity and Long-Term Incentive Compensation Plans - Equity Incentive Program (Details)
$ in Thousands
 3 Months Ended
Sep. 30, 2015
shares
Dec. 31, 2014
shares
Sep. 30, 2015
USD ($)
plan
shares
Sep. 30, 2014
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of plans | plan     2  
Shares available for issuance [1],[2] 7,810,000   6,619,000  
Total Shares Available for Grant under the Company's equity incentive plans:        
Balances as of June 30, 2015 [1],[2] 7,810,000      
Balances as of September 30, 2015 [1],[2] 6,619,000      
Adjustments in period   4,245    
Dividends payable - financing activities | $     $ 20,892 $ 0
2004 Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares available for issuance 4,900,000   4,900,000  
Percent of fair market value on grant date     100.00%  
Total Shares Available for Grant under the Company's equity incentive plans:        
Balances as of September 30, 2015 4,900,000      
Share Reserve Multiplier        
Total Shares Available for Grant under the Company's equity incentive plans:        
Restricted stock units granted [2],[3] (1,477,000)      
Restricted stock units canceled [2] 286,000      
Outside Director Option Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares available for issuance 1,700,000   1,700,000  
Total Shares Available for Grant under the Company's equity incentive plans:        
Balances as of September 30, 2015 1,700,000      
Restricted Stock Unit, Performance-Based And Service-Based        
Total Shares Available for Grant under the Company's equity incentive plans:        
Dividends payable - financing activities | $     $ 20,900  
Restricted Stock Unit, Performance-Based And Service-Based | Special Cash Dividend        
Total Shares Available for Grant under the Company's equity incentive plans:        
Dividends payable - financing activities | $     $ 19,800  
Awards Granted Before November 6, 2013 | 2004 Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
2004 Plan shares reserve multiplier     1.8  
Awards Granted After November 6, 2013 | 2004 Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
2004 Plan shares reserve multiplier     2.0  
[1] The Company has granted only restricted stock units under its equity incentive program since October 2007, except during the three months ended December 31, 2014, the Company adjusted the number of shares subject to outstanding options under the 2004 Plan by an aggregate of 4,245 shares pursuant to a proportionate and equitable adjustment for the effect of the special cash dividend, as required by the 2004 Plan. The total number of outstanding options under the 2004 Plan, as well as the associated exercise prices were adjusted to ensure the aggregate intrinsic value remained the same after considering the effect of the special cash dividend. As the adjustment was required by the 2004 Plan, under the authoritative guidance, the adjustment to the outstanding awards did not result in any incremental compensation expense. Additionally, the adjustment did not have an impact on the shares available for future issuance under the 2004 Plan.
[2] The number of restricted stock units provided in this row reflects the application of the award multiplier as described above (1.8x or 2.0x depending on the grant date of the applicable award).
[3] Includes restricted stock units granted to senior management during the three months ended September 30, 2015 with performance-based vesting criteria (in addition to service-based vesting criteria for any of such restricted stock units that are deemed to have been earned). As of September 30, 2015, it had not yet been determined the extent to which (if at all) the performance-based vesting criteria of such restricted stock units had been satisfied. Therefore, this line item includes all such performance-based restricted stock units granted during the three months ended September 30, 2015, reported at the maximum possible number of shares that may ultimately be issuable under such restricted stock units if all applicable performance-based criteria are achieved at their maximum levels and all applicable service-based criteria are fully satisfied.