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, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2010
Total revenues $ 892,465 $ 840,521 $ 642,482 $ 796,476 $ 892,439 $ 834,059 $ 766,327 $ 682,342 $ 3,171,944 $ 3,175,167 $ 1,820,760
Total costs and operating expenses 574,166 556,247 483,019 542,187 548,370 522,280 497,461 446,726 2,155,619 2,014,837 1,506,594
Gross margin 530,802 485,372 369,627 456,127 536,259 506,363 454,929 418,373      
Income from operations 318,299 284,274 159,463 254,289 344,069 311,779 268,866 235,616 1,016,325 1,160,330 314,166
Net income $ 247,877 $ 205,346 $ 110,797 $ 191,995 $ 245,017 $ 209,783 $ 185,492 $ 154,196 $ 756,015 $ 794,488 $ 212,300
Net income per share:                      
Basic $ 1.48 [1] $ 1.23 [1] $ 0.67 [1] $ 1.15 [1] $ 1.46 [1] $ 1.25 [1] $ 1.11 [1] $ 0.92 [1] $ 4.53 $ 4.75 $ 1.24
Diluted $ 1.46 [1] $ 1.21 [1] $ 0.66 [1] $ 1.13 [1] $ 1.43 [1] $ 1.22 [1] $ 1.09 [1] $ 0.91 [1] $ 4.44 $ 4.66 $ 1.23
[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.