Annual report pursuant to Section 13 and 15(d)

Schedule I - Condensed Statement of Cash Flows (Details)

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Schedule I - Condensed Statement of Cash Flows (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Condensed Financial Statements, Captions [Line Items]      
Net cash used in operating activitiies $ (52,436) $ (107,840) $ (42,764)
Cash flows from investing activities      
Net cash provided by used in investing activities (29,423) (84,534) (22,131)
Cash flows from financing activities      
Excess tax benefit from stock-based compensation 3,385 0 0
Proceeds from sale of common stock, net 3,698 1,200,705 468,598
Net cash provided by (used in) financing activities 840,990 (65,075) 449,894
Net increase (decrease) in cash and cash equivalents 759,131 (257,449) 384,999
Cash and cash equivalents—beginning of period 201,711 459,160 74,161
Cash and cash equivalents—end of period 960,842 201,711 459,160
Parent [Member]
      
Condensed Financial Statements, Captions [Line Items]      
Net cash used in operating activitiies (5,796) (6,699) (4,479)
Cash flows from investing activities      
Return of capital from (investments in) affiliates 139,494 (968,962) (449,756)
Net cash provided by used in investing activities 139,494 (968,962) (449,756)
Cash flows from financing activities      
Excess tax benefit from stock-based compensation 3,385 0 0
Payments related to tax withholdings for stock-based compensation (140,711) (20,414) (14,363)
Repurchases and prepayments of debt 0 (204,630) 0
Proceeds from sale of common stock, net 3,628 1,200,705 468,598
Net cash provided by (used in) financing activities (133,698) 975,661 454,235
Net increase (decrease) in cash and cash equivalents 0 0 0
Cash and cash equivalents—beginning of period 0 0 0
Cash and cash equivalents—end of period $ 0 $ 0 $ 0