Statement of Changes in Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-In Capital	Retained Earnings (Accumulated Deficit)
Balance at Dec. 31, 2012	$ 523,208	$ 241	$ 505,454	$ 17,513
Balance (in shares) at Dec. 31, 2012	24,143,944	24,143,944
Increase (Decrease) in Stockholders' Equity
Grants of restricted stock		2	(2)
Grants of restricted stock (in shares)		160,559
Vesting of restricted stock	505		505
Net income (loss)	(56,153)			(56,153)
Dividends on common stock	(44,968)			(44,968)
Balance at Jun. 30, 2013	$ 422,592	$ 243	$ 505,957	$ (83,608)
Balance (in shares) at Jun. 30, 2013	24,304,503	24,304,503