Employee Benefit Plans (Employee Benefit Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Service cost	$ 452	$ 240	$ 271
Interest cost	2,878	3,394	3,465
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	67,168
Fair value of plan assets at end of year	69,061	67,168
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation	82,005	78,437
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation at beginning of year	78,437	91,107
Service cost	452	240
Interest cost	2,878	3,394
Actuarial (gain) loss	4,844	(11,806)
Benefits paid	(1,814)	(1,620)
Settlement	(2,792)	(2,878)
Projected benefit obligation at end of year	82,005	78,437	91,107
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	67,168	73,431
Actual gain on plan assets	6,499	(1,765)
Benefits paid	(1,814)	(1,620)
Settlement	(2,792)	(2,878)
Fair value of plan assets at end of year	69,061	67,168	$ 73,431
Funded status	$ (12,944)	$ (11,269)