Employee Benefit and Deferred Compensation Plans (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Pension Benefits
Components of net periodic benefit cost (income)
Service cost	$ 0	$ 0	$ 0
Interest cost	899	863	914
Expected return on plan assets	(1,445)	(1,193)	(1,230)
Prior service cost recognized	0	0	0
Recognized actuarial loss	427	355	303
Net periodic benefit cost	(119)	25	(13)
Net actuarial (gain)/loss arising during the period	(3,675)	1,460	1,882
Amortization of net actuarial loss recognized in net periodic pension cost	(427)	(355)	(303)
Total recognized in other comprehensive income	(4,102)	1,105	1,579
Total recognized in net periodic benefit cost and other comprehensive income	(4,221)	1,130	1,566
Discount rate used to determine net periodic pension cost (percent)	3.90%	5.06%	5.50%
Expected return on plan assets (percent)	8.00%	8.00%	8.00%
Other Benefits
Components of net periodic benefit cost (income)
Service cost	28	23	36
Interest cost	70	65	80
Expected return on plan assets	0	0	0
Prior service cost recognized	0	0	0
Recognized actuarial loss	195	73	140
Net periodic benefit cost	293	161	256
Net actuarial (gain)/loss arising during the period	505	(235)	(114)
Amortization of net actuarial loss recognized in net periodic pension cost	(195)	(73)	(140)
Total recognized in other comprehensive income	310	(308)	(254)
Total recognized in net periodic benefit cost and other comprehensive income	$ 603	$ (147)	$ 2
Discount rate used to determine net periodic pension cost (percent)	3.04%	4.61%	4.75%