Employee Benefit Plans - Change in Projected Benefit Obligation and Plan Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, beginning of year	$ 0	$ 23,531,000
Interest cost		625,000	$ 653,000
Actuarial loss		2,245,000
Benefits paid		(95,000)
Settlements		(26,306,000)
Projected benefit obligation, end of year	0	0	23,531,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of assets, beginning of year	0	58,648,000
Actual return on assets		14,000
Benefits and expenses paid		(595,000)
Settlements		(26,306,000)
Assets contributed to 401(k) Plan	0	(7,940,000)	0
Assets reverted to the Company		(23,821,000)
Fair value of assets, end of year		0	$ 58,648,000
Funded status at end of year	$ 0	$ 0
Ratio of plan assets to projected benefit obligation		0.00%