Employee Benefit Plans - Narrative (Details) - USD ($)	1 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]
Assets contributed to 401(k) Plan		$ 0	$ 7,940,000	$ 0
401(k) Plan distribution period (in years)		6 years	7 years
Pension Plan assets reverted to the Company	$ 23,800,000	$ 0	$ 23,820,000	0
Prepaid pension asset	0	0	0
Accumulated benefit obligation of the pension plan	0	0	0	23,531,000
Pension charges		0	13,529,000	1,500,000
Net periodic pension cost, including settlements			8,747,000	1,500,000
Excise tax on Pension Plan			4,800,000
Settlement losses			7,107,000	739,000
Net periodic pension cost included in accumulated other comprehensive loss	0	0	$ 0	$ 5,400,000
Expected long-term rate on plan assets			0.00%	0.00%
Restricted investments	$ 7,940,000	7,072,000	$ 7,940,000
Compensation expense for assets allocated to participants		1,000,000
Gain on unallocated asset		100,000
Future additional compensation expense for assets allocated to participants		$ 7,100,000