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, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2011
Total revenues $ 720,032 $ 729,029 $ 673,011 $ 720,709 $ 892,465 $ 840,521 $ 642,482 $ 796,476 $ 2,842,781 $ 3,171,944 $ 3,175,167
Total costs and operating expenses 532,397 526,783 519,764 534,152 574,166 556,247 483,019 542,187 2,113,096 2,155,619 2,014,837
Gross margin 413,228 419,521 369,096 403,484 530,802 485,372 369,627 456,127      
Income from operations 187,635 202,246 153,247 186,557 318,299 284,274 159,463 254,289 729,685 1,016,325 1,160,330
Net income $ 134,770 $ 166,382 $ 106,630 $ 135,367 $ 247,877 $ 205,346 $ 110,797 $ 191,995 $ 543,149 $ 756,015 $ 794,488
Net income per share:                      
Basic $ 0.81 [1] $ 1.00 [1] $ 0.64 [1] $ 0.81 [1] $ 1.48 [1] $ 1.23 [1] $ 0.67 [1] $ 1.15 [1] $ 3.27 $ 4.53 $ 4.75
Diluted $ 0.80 [1] $ 0.98 [1] $ 0.63 [1] $ 0.80 [1] $ 1.46 [1] $ 1.21 [1] $ 0.66 [1] $ 1.13 [1] $ 3.21 $ 4.44 $ 4.66
[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.