CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Shares	Additional paid-in capital	(Accumulated deficit) / Retained Earnings	Accumulated other comprehensive income (loss)	Predecessor	Predecessor Common Shares	Predecessor Additional paid-in capital	Predecessor (Accumulated deficit) / Retained Earnings	Predecessor Accumulated other comprehensive income (loss)
Balance at Mar. 31, 2011						$ (399,854)	$ 472,754	$ 35,764	$ (951,353)	$ 42,981
Balance (in shares) at Mar. 31, 2011						85,180,377	85,185,497
Increase (Decrease) in Stockholders' Equity
Exercise of stock options							0
Stock-based compensation						1,441		1,441
Net (loss) income						397,519			397,519
Other comprehensive income						894				894
Reorganization adjustment: Cancellation of Predecessor common shares							(472,754)		472,754
Reorganization adjustment: Cancellation of Predecessor common shares (in shares)							(85,185,497)
Reorganization adjustment: Issuance of Successor common shares	202,948	202,948
Reorganization adjustment: Issuance of Successor common shares (in shares)		12,721,354
Fresh start accounting adjustments: Elimination of Predecessor additional-paid-in-capital, accumulated deficit and accumulated other comprehensive income								(37,205)	81,080	(43,875)
Balance at Apr. 30, 2011								37,205	(533,834)	43,875
Balance (in shares) at Apr. 30, 2011						85,185,497
Balance at Dec. 31, 2010					0	(384,076)	472,753	35,470	(933,352)	41,053
Balance (in shares) at Dec. 31, 2010						85,180,377	85,180,377
Increase (Decrease) in Stockholders' Equity
Exercise of stock options						1	1
Exercise of stock options (in shares)						5,120	5,120
Stock-based compensation						294		294
Net (loss) income						(18,001)			(18,001)
Other comprehensive income	0				0	1,928				1,928
Balance at Mar. 31, 2011						(399,854)	472,754	35,764	(951,353)	42,981
Balance (in shares) at Mar. 31, 2011						85,180,377	85,185,497
Balance at Dec. 31, 2010						(384,076)
Balance (in shares) at Dec. 31, 2010						85,180,377
Increase (Decrease) in Stockholders' Equity
Net (loss) income						379,518
Other comprehensive income						2,822
Reorganization adjustment: Issuance of Successor common shares	202,948	202,948
Reorganization adjustment: Issuance of Successor common shares (in shares)		12,721,354
Balance (in shares) at Apr. 30, 2011						85,185,497
Increase (Decrease) in Stockholders' Equity
Net (loss) income	(14,248)			(14,248)		(14,248)
Other comprehensive income	(1,022)				(1,022)
Balance at Jun. 30, 2011	187,678	202,948	0	(14,248)	(1,022)
Balance (in shares) at Jun. 30, 2011	12,721,354	12,721,354
Balance at Dec. 31, 2011	146,407	203,719	8,552	(60,446)	(5,418)
Balance (in shares) at Dec. 31, 2011	12,556,673	12,556,673
Increase (Decrease) in Stockholders' Equity
Stock-based compensation	573		573
Net (loss) income	1			1
Other comprehensive income	1,467				1,467
Balance at Mar. 31, 2012	148,448	203,719	9,125	(60,445)	(3,951)
Balance (in shares) at Mar. 31, 2012	12,566,673	12,556,673
Increase (Decrease) in Stockholders' Equity
Vesting of restricted stock		522	(522)
Vesting of restricted stock (in shares)		43,403
Share capital repurchases	(881)	(881)
Share capital repurchases (in shares)		(73,374)
Stock-based compensation	746		746
Net (loss) income	(2,948)			(2,948)
Other comprehensive income	(1,749)				(1,749)
Balance at Jun. 30, 2012	$ 143,616	$ 203,360	$ 9,349	$ (63,393)	$ (5,700)
Balance (in shares) at Jun. 30, 2012	12,526,702	12,526,702