Loans - Recorded Investment of Individual Loan Categories (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	$ 1,067,935	$ 1,188,466
Net loans	1,051,943	1,170,196
Interest Due	3,186	3,517
Deferred Fees / (Costs)	893	2,251
Recorded Investment	1,056,022	1,175,964
Allowance for loan losses	(15,992)	(18,270)	(18,882)	(19,064)
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	504,584	459,558
Interest Due	1,161	1,369
Deferred Fees / (Costs)	605	913
Recorded Investment	506,350	461,840
Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	283,732	440,579
Interest Due	1,072	1,058
Deferred Fees / (Costs)	382	583
Recorded Investment	285,186	442,220
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	279,619	288,329
Interest Due	953	1,090
Deferred Fees / (Costs)	(94)	755
Recorded Investment	280,478	290,174
Loan Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	1,067,935	1,188,466
Interest Due	3,186	3,517
Deferred Fees / (Costs)	893	2,251
Recorded Investment	1,072,014	1,194,234
Owner Occupied Real Estate [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	156,262	162,694
Interest Due	257	503
Deferred Fees / (Costs)	207	485
Recorded Investment	156,726	163,682
Non-owner Occupied Real Estate [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	224,713	201,763
Interest Due	105	467
Deferred Fees / (Costs)	299	276
Recorded Investment	225,117	202,506
Residential Spec Homes [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	400	1,056
Interest Due		8
Deferred Fees / (Costs)
Recorded Investment	400	1,064
Development & Spec Land Loans [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	21,289	6,963
Interest Due	62	11
Deferred Fees / (Costs)	42
Recorded Investment	21,393	6,974
Commercial and Industrial [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	101,920	87,082
Interest Due	737	380
Deferred Fees / (Costs)	57	152
Recorded Investment	102,714	87,614
Residential Mortgage [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	176,068	181,450
Interest Due	578	565
Deferred Fees / (Costs)	382	583
Recorded Investment	177,028	182,598
Residential Construction [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	9,508	7,681
Interest Due	14	13
Deferred Fees / (Costs)
Recorded Investment	9,522	7,694
Mortgage Warehouse [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	98,156	251,448
Interest Due	480	480
Deferred Fees / (Costs)
Recorded Investment	98,636	251,928
Direct Installment [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	29,983	27,831
Interest Due	104	115
Deferred Fees / (Costs)	(281)	(204)
Recorded Investment	29,806	27,742
Direct Installment Purchased [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	294	429
Interest Due
Deferred Fees / (Costs)
Recorded Investment	294	429
Indirect Installment [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	131,384	133,481
Interest Due	320	370
Deferred Fees / (Costs)
Recorded Investment	131,704	133,851
Home Equity [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	117,958	126,588
Interest Due	529	605
Deferred Fees / (Costs)	187	959
Recorded Investment	$ 118,674	$ 128,152