Defined Benefit Pension Plans Schedule of Amounts Recognized in Other Comprehensive Income (loss), pre-tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (gain) loss	$ (6,894)	$ 25,838	$ (5,881)
Settlement/ curtailment loss	(336)	(55)	(325)
Plan asset (gain) loss	343	129	516
Amortization of net actuarial gain (loss)	(1,979)	(572)	(926)
Amortization of prior service cost	(59)	(138)	(70)
Other	(46)	68	(658)
Other comprehensive (income) loss	$ (8,971)	$ 25,270	$ (7,344)