Employee Benefit Plans (Pension Costs) (Details) (Pension Plan SERP and Restoration Plan [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Pension Plan SERP and Restoration Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service costs	$ 282	$ 637	$ 932
Interest costs	1,231	1,293	1,386
Expected return on plan assets	0	(57)	(41)
Amortization of net (gain)/loss	(424)	179	80
Net periodic benefit cost	$ 1,089	$ 2,052	$ 2,357