Loans (Details 3) (USD $)	3 Months Ended			12 Months Ended
	Mar. 31, 2014 Item	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012
Loans
Maximum Past Due Period for Considering Loans as Pass Loans	30 days
Recorded impaired loans (net of SBA guaranteed portions) with specific reserves	$ 20,102,000	$ 17,273,000		$ 17,273,000
Total allowance for loan losses	53,464,000	53,563,000	58,577,000	53,563,000	52,397,000	63,285,000
Allowance coverage of gross loans receivable (as a percent)	1.86%	1.90%		1.90%
Consumer loan allowance coverage (as a percent)	2.23%	2.24%		2.24%
GVA portion of total allowance for loan losses (as a percent)	84.50%			92.90%
SVA portion of total allowance for loan losses (as a percent)	15.50%			7.10%
Allowance for loan losses roll-forward and breakdown by loan segment
Number of impaired loans in which allowance coverage results in increase in loan	3
Impairment on loan	8,900,000
Cash basis income recognized from impaired loans	465,000	411,000	469,000
Impaired loans broken down by those with and without specific reserves
Recorded Investment, With Specific Reserves, Without Charge-Offs	17,838,000	17,265,000		17,265,000
Recorded Investment, With Specific Reserves, With Charge-Offs	2,264,000	8,000		8,000
Recorded Investment, Without Specific Reserves, Without Charge-Offs	43,130,000	36,781,000		36,781,000
Recorded Investment, Without Specific Reserves, With Charge-Offs	14,716,000	18,760,000		18,760,000
Total	77,948,000	72,814,000		72,814,000
Allowance on Impaired Loans	(8,291,000)	(3,815,000)		(3,815,000)
Impaired Loans Net of Allowance	69,657,000	68,999,000		68,999,000
Total balance of net of SBA guaranteed portions	72,500,000	65,900,000		65,900,000
Commercial & Industrial loans
Loans
Total allowance for loan losses	13,353,000	11,238,000	13,464,000	11,238,000		12,737,000
Allowance for loan losses roll-forward and breakdown by loan segment
Number of impaired loans in which allowance coverage results in increase in loan	1
Impairment on loan	2,200,000
Impaired loans broken down by those with and without specific reserves
Allowance on Impaired Loans	$ (5,380,000)	$ (1,958,000)		$ (1,958,000)