Employee Benefit Plans (Pension Costs) (Details) - Pension Plan SERP and Restoration Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service costs	$ 161	$ 282	$ 637
Interest costs	1,205	1,231	1,293
Expected return on plan assets	0	0	(57)
Amortization of net (gain)/loss	(620)	(424)	179
Net periodic benefit cost	$ 746	$ 1,089	$ 2,052