Fair Value Measurements (Details 2) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Investments in securities that are classified as level 3
Available-for-sale Securities	$ 340,081	$ 356,862
Pooled Trust Preferred Securities [Member] | Discounted cash flow methodology [Member] | Significant Unobservable Inputs (Level 3) [Member] | Weighted Average [Member]
Investments in securities that are classified as level 3
Cumulative Prepayment	6.90%	7.20%
Cumulative Default	16.20%	18.10%
Loss Given Default	95.90%	95.70%
Cure Given Default	32.90%	39.90%
Pooled Trust Preferred Securities [Member] | Discounted cash flow methodology [Member] | Significant Unobservable Inputs (Level 3) [Member] | Minimum [Member]
Investments in securities that are classified as level 3
Cumulative Prepayment	0.00%	0.00%
Cumulative Default	3.00%	3.00%
Loss Given Default	85.00%	85.00%
Cure Given Default	0.00%	0.00%
Pooled Trust Preferred Securities [Member] | Discounted cash flow methodology [Member] | Significant Unobservable Inputs (Level 3) [Member] | Maximum [Member]
Investments in securities that are classified as level 3
Cumulative Prepayment	75.00%	76.00%
Cumulative Default	100.00%	100.00%
Loss Given Default	100.00%	100.00%
Cure Given Default	75.00%	75.00%
IMPAIRED LOANS [Member] | Significant Unobservable Inputs (Level 3) [Member]
Investments in securities that are classified as level 3
Fair Value	3,253	10,328
OTHER REAL ESTATE OWNED [Member] | Significant Unobservable Inputs (Level 3) [Member]
Investments in securities that are classified as level 3
Fair Value	$ 9,675	$ 7,633