Net Deferred Tax Asset and Income Taxes (Schedule of Gross Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Gross deferred tax assets:
Allowance for loan losses	$ 10,033	$ 11,037
Defined benefit pension obligations	3,544	11,462
Losses on write-downs of securities to fair value	941	1,500
Deferred compensation	2,545	2,174
Deferred loan origination fees	1,593	1,432
Stock based compensation	1,686	1,555
Other	2,650	2,680
Gross deferred tax assets	22,992	31,840
Gross deferred tax liabilities:
Net unrealized gains on securities available for sale	(1,791)	(4,318)
Amortization of intangibles	(1,977)	(2,207)
Deferred loan origination costs	(3,697)	(3,176)
Other	(2,776)	(2,255)
Gross deferred tax liabilities	(10,241)	(11,956)
Net deferred tax asset	$ 12,751	$ 19,884