Employee Benefit Plans Schedule of net periodic benefit costs and other comprehensive income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Components of Net Periodic Benefit Cost
Interest cost			$ 168
Expected return on plan assets			(53)
Recognized net gain due to curtailment			620
Recognized net actuarial loss			1,117
Net periodic benefit cost			1,852
Other Change in Plan Assets and Benefit Obligations Recognized in Accumulated Other Comprehensive Income
Net gain			(234)
Deferred income tax expense (benefit)			80
Total recognized in other comprehensive income	0	0	(154)
Total recognized in net periodic benefit costs and other comprehensive loss			$ 1,698