Stockholder's Equity - Reconciliation of the Company's and Banks Stockholders Equity to Regulatory Capital (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2013
Consolidated [Member]
Dec. 31, 2012
Consolidated [Member]
Dec. 31, 2013
Bank [Member]
Dec. 31, 2012
Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]                
Total stockholders' equity per financial statements $ 249,205 $ 233,943 $ 219,944 $ 215,611 $ 249,205 $ 233,943 $ 235,728 $ 197,399
Adjustments to Tier 1 capital:                
Accumulated other comprehensive income 4,104 4,915     (4,104) (4,915) (4,104) (4,774)
Goodwill disallowed         (13,687) (13,687) (13,687) (13,687)
Servicing assets disallowed         (72) (86) (72) (86)
Total Tier 1 capital         231,342 215,255 217,865 178,852
Adjustments to total capital:                
Allowance for loan losses 25,335 20,504 13,053 10,155 25,335 20,504 25,335 20,504
45% of net unrealized gains on marketable equity securities         2,900 1,768 2,900 1,757
Total regulatory capital         $ 259,577 $ 237,527 $ 246,100 $ 201,113