Employee Benefit Plans - Changes in Obligations and Funded Status (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Change in plan assets:
Fair value of plan assets at beginning of year	$ 9,368	$ 6,851
Actual return on plan assets	612	(120)
Employer contribution	0	3,000
Benefits paid	(649)	(363)
Fair value of plan assets at end of year	9,331	9,368
Change in benefit obligation:
Benefit obligation at beginning of year	10,174	10,249
Interest cost	465	403
Actuarial loss	483	254
Effect of change in assumptions	136	(369)
Benefits paid	(649)	(363)
Benefit obligation at end of year	10,609	10,174
Funded status (plan assets less benefit obligation)	(1,278)	(806)
Amounts recognized in accumulated other comprehensive loss, net of tax, consists of:
Accumulated net actuarial loss	3,812	3,529
Accumulated prior service benefit	0	(15)
Amount recognized, end of year	$ 3,812	$ 3,514