Income Taxes - Continuing and Discontinuing Tax (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Expense (Benefit) from: [Abstract]
Continuing operations	$ 13,224	$ 2,994	$ (1,333)
Amounts attributable to discontinued operations	600	(289)	(166)
Total income tax expense (benefit)	$ 13,824	$ 2,705	$ (1,499)