Employee Benefit Plans Benefits (Details) - USD ($) $ in Thousands		12 Months Ended
	Feb. 01, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Retirement plan and pension plan, total		$ 11,728	$ 10,525	$ 10,157
Amount to be amortized from accumulated other comprehensive income (loss) in next twelve months		2,700
Other Postretirement Benefit Plan | 401k Plan
Defined Benefit Plan Disclosure [Line Items]
401(k) Retirement Plan		$ 7,418	6,423	8,643
Maximum percentage of eligible employee’s covered compensation		5.00%
Percentage of plan vested		100.00%
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Pension Plan		$ 4,310	4,102	1,514
Other Postretirement Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Pension Plan		(466)	$ (52)	$ (126)
Effect of curtailment	$ 3,400
Plan amendment		$ 2,500