Income Taxes - Continuing and Discontinuing Tax (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Federal Income Tax Expense (Benefit), Continuing Operations	$ 0	$ 13,224	$ 2,994
Amounts attributable to discontinued operations	0	600	(289)
Total income tax expense (benefit)	0	13,824	2,705
Discontinued operations
Amounts attributable to discontinued operations	$ 0	$ (18)	$ 106