Employee Benefit Plans - Summary of Components of Net Periodic Pension Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]
Service cost		$ 0	$ 225
Interest cost		625	653
Expected return on assets		550	(443)
Amortization of loss		465	326
Settlement charges		7,107	739
Net periodic pension cost		8,747	1,500
Other changes in plan assets and obligations recognized in Other comprehensive income:
Gain		(5,392)	(3,260)
Total other comprehensive income	$ 0	(5,392)	(3,260)
Total net periodic pension cost and other comprehensive income (loss)		$ 3,355	$ (1,760)