FHLB Advances and Junior Subordinated Debentures (Details) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
FHLB borrowings
Maximum FHLB advances as a percentage of total assets based on qualifying collateral	30.00%
Borrowing outstanding	$ 150,292,000	$ 190,325,000
Rate (as a percent)	0.25%	0.25%
Fair value of borrowings	10,300,000
Average balance during the quarter	191,646,000	184,259,000
Maximum amount outstanding at any month-end	190,314,000	210,336,000
Average interest rate during the quarter (as a percent)	0.15%	0.14%
October 25, 2013
FHLB borrowings
Borrowing outstanding	40,000,000
Rate (as a percent)	0.11%
December 26, 2012
FHLB borrowings
Borrowing outstanding	100,000,000
Rate (as a percent)	0.11%
May 20, 2011
FHLB borrowings
Borrowing outstanding	3,000,000
Rate (as a percent)	2.35%
June 1, 2011
FHLB borrowings
Borrowing outstanding	1,000,000
Rate (as a percent)	2.16%
June 8, 2011
FHLB borrowings
Borrowing outstanding	1,000,000
Rate (as a percent)	2.12%
July 25, 2011
FHLB borrowings
Borrowing outstanding	5,000,000
Rate (as a percent)	2.10%
FHLB line of credit
FHLB borrowings
Actual borrowing capacity	782,200,000
Borrowing outstanding	140,000,000
Remaining capacity	642,200,000
Rate (as a percent)	0.18%
FHLB fixed rate term
FHLB borrowings
Actual borrowing capacity	0
Fair value of borrowings	$ 10,000,000