Annual report pursuant to Section 13 and 15(d)

Quarterly Consolidated Results of Operations (Unaudited) (Details)

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Quarterly Consolidated Results of Operations (Unaudited) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2012
Quarterly Financial Information Disclosure [Abstract]                      
Total revenues $ 734,343 $ 831,599 $ 705,129 $ 658,337 $ 720,032 $ 729,029 $ 673,011 $ 720,709 $ 2,929,408 $ 2,842,781 $ 3,171,944
Total costs and operating expenses 561,329 570,436 517,147 508,426 532,397 526,783 519,764 534,152 2,157,338 2,113,096 2,155,619
Gross margin 407,678 488,773 419,315 380,680 413,228 419,521 369,096 403,484      
Income from operations 173,014 261,163 187,982 149,911 187,635 202,246 153,247 186,557 772,070 729,685 1,016,325
Net income $ 128,731 $ 203,581 $ 139,246 $ 111,197 $ 134,770 $ 166,382 $ 106,630 $ 135,367 $ 582,755 $ 543,149 $ 756,015
Net income per share:                      
Basic (in dollars per share) $ 0.78 [1] $ 1.22 [1] $ 0.84 [1] $ 0.67 [1] $ 0.81 [1] $ 1.00 [1] $ 0.64 [1] $ 0.81 [1] $ 3.51 $ 3.27 $ 4.53
Diluted (in dollars per share) $ 0.77 [1] $ 1.21 [1] $ 0.83 [1] $ 0.66 [1] $ 0.80 [1] $ 0.98 [1] $ 0.63 [1] $ 0.80 [1] $ 3.47 $ 3.21 $ 4.44
[1] Basic and diluted earnings per share are computed independently for each of the quarters presented based on the weighted-average basic and fully diluted shares outstanding for each quarter. Therefore, the sum of quarterly basic and diluted per share information may not equal annual basic and diluted earnings per share.