Pension and Other Employee Benefit Plans (Components of Unamortized Pension Costs) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Compensation and Retirement Disclosure [Abstract]
Unamortized actuarial loss	$ 2,364
Deferred taxes	(882)
Net unamortized pension costs	1,482
Unamortized actuarial loss, Amortization	(591)
Deferred taxes, Amortization	220
Net unamortized pension costs, Amortization	(371)	(335)
Unamortized actuarial loss	1,773
Deferred taxes	(662)
Net unamortized pension costs	$ 1,111