Federal Home Loan Bank and Federal Reserve Bank Borrowings (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
FHLB Fixed Rate Advances, Maturities Summary [Abstract]
FHLB Fixed Rate Advances, Weighted Average Interest Rate, Within 1 year	0.23%
FHLB Fixed Rate Advances, Amount, Within 1 year	$ 30,000
Federal Home Loan Bank, Advances, Maturities Summary, Average Interest Rate, One To Five Years From Balance Sheet Date	5.66%
FHLB Fixed Rate Advances, Over 1 through 5 years	1,000
FHLB Fixed Rate Advances, Weighted Average Interest Rate, Due after 10 years	5.37%
FHLB Fixed Rate Advances, Due after 10 years	5,000
FHLB Fixed Rate Advances, Total Amount before valuation adjustment	36,000
Valuation adjustment from acquisition accounting	606
FHLB Fixed Rate Advances, Total Amount	36,606
Federal Home Loan Bank, Advances, Activity for Year [Abstract]
FHLB Advances	36,606	6,644	119,009
Average balance during the year	51,030	100,337	120,419
Maximum month-end balance during the year	190,631	118,967	127,426
Weighted average rate during the year	1.12%	2.79%	2.76%
Weighted average rate at December 31	1.09%	5.42%	2.81%
FHLB Advances, Collateral Pledged	1,075,389	443,419
FHLB Borrowing Capacity	1,037,159	435,189
Federal Reserve Bank, Advances, Collateral Pledged	85,452	59,456
Federal Reserve Bank borrowing capacity	85,452	59,456
Securities Investment [Member]
Federal Home Loan Bank, Advances, Activity for Year [Abstract]
Federal Reserve Bank, Advances, Collateral Pledged	40,210	45,641
Loans Receivable [Member]
Federal Home Loan Bank, Advances, Activity for Year [Abstract]
FHLB Advances, Collateral Pledged	1,075,389	443,419
Commercial Loan [Member]
Federal Home Loan Bank, Advances, Activity for Year [Abstract]
Federal Reserve Bank, Advances, Collateral Pledged	$ 45,242	$ 13,815