Income Taxes - Income Tax Expense (Benefit) Reconciliation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Statutory federal income tax rate	35.00%		35.00%	35.00%
Tax at the statutory federal rate		$ 1,603	$ 2,240	$ (135,078)
State income taxes (net of federal benefit)		160	224	(13,508)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount		(2,218)	(2,870)	94,505
Real estate investment trust income exclusion		0	0	(1,468)
Other		46	793	(109)
Total income tax (benefit) expense		$ (409)	$ 387	$ (55,658)