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, 2012
Dec. 31, 2011
Dec. 31, 2010
Condensed Financial Statements, Captions [Line Items]      
Net cash used in operating activitiies $ (107,840) $ (42,764) $ (16,920)
Cash flows from investing activities      
Net cash provided by (used in) investing activities (84,534) (22,131) 108,986
Cash flows from financing activities      
Purchase of treasury shares (20,414) (14,363) (2,844)
Repurchases and prepayments of debt (1,326,514) 0 (104,681)
Proceeds from Issuance of Common Stock 1,200,705 468,598 0
Net cash provided by (used in) financing activities (65,075) 449,894 (106,277)
Net decrease in cash and cash equivalents (257,449) 384,999 (14,211)
Cash and cash equivalents—beginning of period 459,160 74,161 88,372
Cash and cash equivalents—end of period 201,711 459,160 74,161
Parent [Member]
      
Condensed Financial Statements, Captions [Line Items]      
Net cash used in operating activitiies (6,699) (4,479) (27,531)
Cash flows from investing activities      
Return of capital from (investments in) affiliates (968,962) (449,756) (18,934)
Net cash provided by (used in) investing activities (968,962) (449,756) (18,934)
Cash flows from financing activities      
Purchase of treasury shares (20,414) (14,363) (2,844)
Repurchases and prepayments of debt (204,630) 0 0
Proceeds from Issuance of Common Stock 1,200,705 468,598 49,308
Issuance of restricted stock 0 0 1
Net cash provided by (used in) financing activities 975,661 454,235 46,465
Net 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