Accumulated Other Comprehensive Loss (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Loss [Abstract]
Net unrealized gains on securities	$ 2,352	$ (741)
Tax effect	(800)	252
Net of tax amount	1,552	(489)
Net unrealized losses on derivatives	(191)	(561)
Tax effect	65	191
Net of tax amount	(126)	(370)
Accumulated pension adjustment	(6,858)	(5,814)	(7,576)
Tax effect	2,332	1,977	2,576
Net of tax amount	(4,526)	(3,837)	(5,000)
Total accumulated other comprehensive loss	$ (3,100)	$ (4,696)