Benefit Plans (Changes in the defined benefit pension plan) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Change in benefit obligation
Benefit obligation, January 1	$ 13,250	$ 10,732
Interest cost	494	486	$ 450
Actuarial (gain) loss	(744)	3,049
Benefits paid, including plan expenses	(1,023)	(1,017)
Benefit obligation, December 31	11,977	13,250	10,732
Change in plan assets
Fair value of plan assets, January 1	10,390	10,508
Investment return	5	699
Contributions	200	200
Benefits paid, including plan expenses	(1,023)	(1,017)
Fair value of plan assets, December 31	9,572	10,390	10,508
Deficiency in funded status at December31, included on the consolidated balance sheets in accrued interest payable and other liabilities	(2,405)	(2,860)
Accrued benefit cost at January 1	(2,860)	(224)
Contributions	200	200
Net periodic cost for the year	(492)	(300)	(208)
Net change in unrecognized actuarial loss and prior service cost	747	(2,536)	2,328
Accrued benefit cost at December 31	$ (2,405)	$ (2,860)	$ (224)