Employee Benefit Plans Projected Benefit Obligation (Details) - USD ($) $ in Thousands		12 Months Ended
	Feb. 01, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		$ 51,730
Fair value of plan assets at end of year		46,971	$ 51,730
Other Postretirement Benefit Plans
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation at beginning of year		5,552	8,169
Service cost		0	15	$ 228
Interest cost		206	206	322
Benefit payments		(251)	(209)
Change due to change in assumptions		(2,821)	1,261
Effect of curtailment	$ (3,400)	0	(3,358)
Experience gain		189	(532)
Projected benefit obligation at end of year		2,875	5,552	8,169
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		8	23
Employer contributions		258	194
Benefit payments		(251)	(209)
Fair value of plan assets at end of year		15	8	23
Pension Plans
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation at beginning of year		93,079	73,362
Service cost		579	367	202
Interest cost		3,405	3,413	3,087
Benefit payments		(3,904)	(5,164)
Change due to change in assumptions		(7,722)	22,055
Experience gain		(701)	(954)
Projected benefit obligation at end of year		84,736	93,079	73,362
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		51,730	55,448
Actual return on assets		(855)	1,446
Benefit payments		(3,904)	(5,164)
Fair value of plan assets at end of year		$ 46,971	$ 51,730	$ 55,448