Employee Benefit Plans Pension Curtailment costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Defined Benefit Plan Disclosure [Line Items]
Pension Curtailment, Recognized Prior Service Cost	$ 0	$ 0	$ 813	$ 0