Employee Benefit Plans (Details) - Pension Plan Cost and Obligations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016		Dec. 31, 2015	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Accumulated benefit obligation	$ 68,959		$ 67,185
Change in projected benefit obligation:
Beginning balance	67,185		67,283
Service cost	0		0
Interest cost	1,635		2,334	$ 2,346
Settlements	(3,136)		(7,320)
Actuarial loss	3,851		5,336
Benefits paid	(576)		(448)
Ending balance	68,959		67,185	67,283
Change in fair value of plan assets:
Beginning balance	64,903		72,193
Actual return on plan assets	3,998		478
Benefits paid	(576)		(448)
Settlements	(3,136)		(7,320)
Ending balance	65,189	[1]	64,903	$ 72,193
Funded status recognized in the Consolidated Statements of Financial Condition:
Noncurrent liability	(3,770)		(2,282)
Amounts recognized in accumulated other comprehensive loss:
Prior service cost	0		0
Net loss	28,483		26,481
Net amount recognized	$ 28,483		$ 26,481
Actuarial losses included in accumulated other comprehensive loss as a percent of:
Accumulated benefit obligation	41.30%		39.40%
Fair value of plan assets	43.70%		40.80%
Amounts expected to be amortized from accumulated other comprehensive loss into net periodic benefit cost in the next fiscal year:
Prior service cost	$ 0		$ 0
Net loss	582		516
Net amount expected to be recognized	$ 582		$ 516
Weighted-average assumptions at the end of the year used to determine the actuarial present value of the projected benefit obligation:
Discount rate	3.86%		3.99%

[1] Additional information regarding the fair value of Pension Plan assets as of December 31, 2016 can be found in Note 22, "Fair Value."