Income Taxes - Narrative (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Tax Credit Carryforward [Line Items]
Effective Income Tax Rate, Continuing Operations	10.20%	149.00%
Federal income tax refund received		$ 2,025
Minimum
Tax Credit Carryforward [Line Items]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Lower Bound	0
Maximum
Tax Credit Carryforward [Line Items]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Upper Bound	60