Income Taxes - Provision for Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Current:
Federal	$ (200)	$ 0
State	0	0
Total current	(200)	0
Deferred:
Federal	2,307	954
State	501	251
Total deferred	2,808	1,205
Increase (decrease) in valuation allowance for deferred tax assets	0	(1,205)
Total income taxes	$ 2,608	$ 0