Comprehensive Income (Details 3) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Amortization of defined benefit pension items
Prior service cost	[1]			$ (84)
Actuarial losses	[1]			1,419
Total before tax				1,335
Tax benefit				(520)
Net of tax		$ 272	$ 107	$ 815	$ 323

[1] These amounts were included in the computation of net periodic pension cost. See Note 6 for additional details.