Accumulated Other Comprehensive Loss (Reclassifications out of Accumulated Comprehensive Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Statement of Comprehensive Income [Abstract]
Prior service cost	$ 40	[1]	$ 40	[1]
Amortization of actuarial loss (1)	153	[1]	218	[1]
Total before tax	193		258
Income tax benefit	(72)		(96)
Amount reclassified out of accumulated other comprehensive loss	$ 121		$ 162

[1] These accumulated other comprehensive loss components are included in the computation of net periodic benefit cost (income) in Note 3 "Employee Benefit Plans."