Employee Benefit Plans Projected Benefit Obligation (Details) - USD ($)		12 Months Ended
	Feb. 01, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		$ 46,971,000
Fair value of plan assets at end of year		48,684,000	$ 46,971,000
Other Postretirement Benefit Plans
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation at beginning of year		2,875,000	5,552,000
Service cost		0	0	$ 15,000
Interest cost		85,000	206,000	206,000
Benefit payments		(282,000)	(251,000)
Change in assumptions		(20,000)	(2,821,000)
Effect of curtailment	$ (3,400,000)
Experience gain		732,000	(189,000)
Projected benefit obligation at end of year		1,926,000	2,875,000	5,552,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		15,000	8,000
Benefit payments		(282,000)	(251,000)
Fair value of plan assets at end of year		3,000	15,000	8,000
Employer contributions		270,000	258,000
Pension Plans
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation at beginning of year		84,736,000	93,079,000
Service cost		688,000	579,000	367,000
Interest cost		3,520,000	3,405,000	3,413,000
Benefit payments		(5,172,000)	(3,904,000)
Change in assumptions		1,635,000	(7,722,000)
Experience gain		(44,000)	(701,000)
Projected benefit obligation at end of year		85,363,000	84,736,000	93,079,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		46,971,000	51,730,000
Actual return on plan assets		1,716,000	(855,000)
Benefit payments		(5,172,000)	(3,904,000)
Fair value of plan assets at end of year		48,684,000	46,971,000	$ 51,730,000
Employer contributions		$ 5,169,000	$ 0