Fair Value Measurement for Financial and Non-Financial Assets and Liabilities (Details 3) (Non-recurring basis, USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Net Realized (Losses)/Gains	$ (92)	$ (7,001)
Collateral Dependent Impaired Loans | Commercial Real Estate
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Net Realized (Losses)/Gains	(81)	(6,134)
Collateral Dependent Impaired Loans | Residential Real Estate
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Net Realized (Losses)/Gains		(72)
OREO | Commercial Real Estate
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Net Realized (Losses)/Gains	(11)	(26)
Impaired Loans Held-For-Sale | Commercial Real Estate
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Net Realized (Losses)/Gains		(769)
Level 3
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Total	14,609	15,645
Level 3 | Collateral Dependent Impaired Loans | Commercial Real Estate
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Total	5,191	9,330
Level 3 | Collateral Dependent Impaired Loans | Residential Real Estate
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Total	449	649
Level 3 | OREO | Commercial Real Estate
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Total	8,434	4,866
Level 3 | OREO | Residential Real Estate
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Total	535
Level 3 | Impaired Loans Held-For-Sale | Commercial Real Estate
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Total		800
Total
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Total	14,609	15,645
Total | Collateral Dependent Impaired Loans | Commercial Real Estate
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Total	5,191	9,330
Total | Collateral Dependent Impaired Loans | Residential Real Estate
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Total	449	649
Total | OREO | Commercial Real Estate
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Total	8,434	4,866
Total | OREO | Residential Real Estate
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Total	535
Total | Impaired Loans Held-For-Sale | Commercial Real Estate
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Total		$ 800