Fair Value (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Breakdown of trust preferred securities
Total life-to-date impairment	$ (1,641)	$ 35	$ 141
Trust preferred securities
Breakdown of trust preferred securities
Total number of trust preferred securities	12	12
Par value	14,366	14,449
Number not considered OTTI	1	10
Par value	956	11,491
Number considered OTTI	11	2
Par value	13,410	2,958
Life-to-date impairment recognized in earnings	2,305	351
Life-to-date impairment recognized in other comprehensive income	1,718	1,868
Total life-to-date impairment	$ 4,023	$ 2,219