Deposits - Total Deposits (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Banking And Thrift [Abstract]
Percentage Change, Checking, non-interest bearing	(0.20%)
Percentage Change, Checking, interest bearing	(2.60%)
Percentage Change, Savings accounts	5.60%
Percentage Change, Certificates of deposit	(17.00%)
Percentage change, Total	(0.40%)
Checking, non-interest bearing	$ 221,831	$ 221,293
Checking, interest bearing	438,291	450,216
Savings accounts	947,950	898,043
Certificates of deposit	220,586	265,762
Total deposits	$ 1,828,658	$ 1,835,314