Employee Benefit Plans - Components of Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 9
Interest cost	619
Expected return on plan assets, net of expenses	0
Amortization of actuarial (gain)/loss	(54)
Total for defined benefit plans sponsored by the Company	574	$ 2,673	$ 4,274
Multi-employer plan withdrawal accrual	0	4,100	0
Net periodic benefit cost	1,896	6,773	4,274
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		85	79
Interest cost		1,956	1,915
Expected return on plan assets, net of expenses		(1,837)	(1,730)
Amortization of actuarial (gain)/loss		230	380
Total for defined benefit plans sponsored by the Company		434	644
Other Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	9
Interest cost	269
Total for defined benefit plans sponsored by the Company	278	2,001	2,991
Net periodic benefit cost	278
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0
Interest cost	350
Expected return on plan assets, net of expenses	0
Amortization of actuarial (gain)/loss	(54)
Total for defined benefit plans sponsored by the Company	296	$ 238	$ 639
Net periodic benefit cost	$ 296