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Selected Quarterly Financial Data (Unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net revenues | $ 267,697 us-gaap_Revenues | $ 170,804 us-gaap_Revenues | $ 114,736 us-gaap_Revenues | $ 118,029 us-gaap_Revenues | $ 68,067 us-gaap_Revenues | $ 69,252 us-gaap_Revenues | $ 70,434 us-gaap_Revenues | $ 55,000 us-gaap_Revenues | $ 671,266 us-gaap_Revenues | $ 262,753 us-gaap_Revenues | $ 248,926 us-gaap_Revenues
Operating Income (Loss) | 129,458 us-gaap_OperatingIncomeLoss | 53,454 us-gaap_OperatingIncomeLoss | 18,110 us-gaap_OperatingIncomeLoss | 25,109 us-gaap_OperatingIncomeLoss | 2,926 us-gaap_OperatingIncomeLoss | 15,137 us-gaap_OperatingIncomeLoss | 22,456 us-gaap_OperatingIncomeLoss | 14,944 us-gaap_OperatingIncomeLoss | 226,131 us-gaap_OperatingIncomeLoss | 55,463 us-gaap_OperatingIncomeLoss | 97,263 us-gaap_OperatingIncomeLoss
Income tax expense recorded for continuing operations | 67,757 us-gaap_IncomeTaxExpenseBenefit | 4,876 us-gaap_IncomeTaxExpenseBenefit | 31,461 us-gaap_IncomeTaxExpenseBenefit | 49,247 us-gaap_IncomeTaxExpenseBenefit | 21,027 us-gaap_IncomeTaxExpenseBenefit | 23,400 us-gaap_IncomeTaxExpenseBenefit | 25,514 us-gaap_IncomeTaxExpenseBenefit | 28,195 us-gaap_IncomeTaxExpenseBenefit | 153,341 us-gaap_IncomeTaxExpenseBenefit | 98,136 us-gaap_IncomeTaxExpenseBenefit | 26,363 us-gaap_IncomeTaxExpenseBenefit
Net income | $ 110,073 us-gaap_NetIncomeLoss | $ 6,920 us-gaap_NetIncomeLoss | $ 47,852 us-gaap_NetIncomeLoss | $ 82,558 us-gaap_NetIncomeLoss | $ 24,278 us-gaap_NetIncomeLoss | $ 40,527 us-gaap_NetIncomeLoss | $ 43,828 us-gaap_NetIncomeLoss | $ 44,559 us-gaap_NetIncomeLoss | $ 247,403 us-gaap_NetIncomeLoss | $ 153,192 us-gaap_NetIncomeLoss | $ 68,371 us-gaap_NetIncomeLoss
Basic net income per share | $ 1.29 us-gaap_EarningsPerShareBasic | $ 0.08 us-gaap_EarningsPerShareBasic | $ 0.56 us-gaap_EarningsPerShareBasic | $ 0.97 us-gaap_EarningsPerShareBasic | $ 0.30 us-gaap_EarningsPerShareBasic | $ 0.52 us-gaap_EarningsPerShareBasic | $ 0.57 us-gaap_EarningsPerShareBasic | $ 0.61 us-gaap_EarningsPerShareBasic | $ 2.90 us-gaap_EarningsPerShareBasic | $ 1.98 us-gaap_EarningsPerShareBasic | $ 1.22 us-gaap_EarningsPerShareBasic
Diluted net income per share | $ 1.28 us-gaap_EarningsPerShareDiluted | $ 0.08 us-gaap_EarningsPerShareDiluted | $ 0.56 us-gaap_EarningsPerShareDiluted | $ 0.96 us-gaap_EarningsPerShareDiluted | $ 0.30 us-gaap_EarningsPerShareDiluted | $ 0.52 us-gaap_EarningsPerShareDiluted | $ 0.56 us-gaap_EarningsPerShareDiluted | $ 0.61 us-gaap_EarningsPerShareDiluted | $ 2.88 us-gaap_EarningsPerShareDiluted | $ 1.97 us-gaap_EarningsPerShareDiluted | $ 1.21 us-gaap_EarningsPerShareDiluted

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