Fair Value of Assets and Liabilities - Schedule Of Estimated Fair Values (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014		Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Duration of purchased receivables	1 year
Other assets (interest rate contracts and MSR)	$ 1,215		$ 186
Purchased receivables, net	14,328		16,025
Other liabilities (interest rate contracts)	46		186
Commitments to extend credit	2,368	[1]	1,879	[1]
Standby letters of credit	59	[1]	65	[1]
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commitments to extend credit	236,807	[1]	187,931	[1]
Standby letters of credit	5,948	[1]	6,463	[1]
Level 1 inputs:
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash, due from banks and deposits in other banks	129,341		99,091
Investment securities	33,558		20,487
Other assets (interest rate contracts and MSR)	0		0
Other liabilities (interest rate contracts)
Level 1 inputs: | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash, due from banks and deposits in other banks	129,341		99,091
Investment securities	33,558		20,487
Level 2 inputs:
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities	209,772		232,458
Accrued interest receivable	3,483		2,729
Other assets (interest rate contracts and MSR)	46		186
Deposits	1,192,152		1,003,816
Securities sold under repurchase agreements	19,931		21,143
Borrowings	2,256		6,448
Accrued interest payable	55		52
Other liabilities (interest rate contracts)	46		186
Level 2 inputs: | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities	209,646		232,305
Accrued interest receivable	3,483		2,729
Other assets (interest rate contracts and MSR)	46		186
Deposits	1,192,367		1,003,723
Securities sold under repurchase agreements	19,931		21,143
Borrowings	2,175		6,527
Accrued interest payable	55		52
Other liabilities (interest rate contracts)	46		186
Level 3 inputs:
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets (interest rate contracts and MSR)	1,169		0
Loans and loans held for sale, net	934,696		769,570
Purchased receivables, net	14,328		16,025
Mortgage servicing rights	1,169		0
Other liabilities (interest rate contracts)
Junior subordinated debentures	16,368		15,456
Level 3 inputs: | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and loans held for sale, net	930,741		765,035
Purchased receivables, net	14,328		16,025
Mortgage servicing rights	1,169		0
Junior subordinated debentures	$ 18,558		$ 18,558

[1] Carrying amounts reflect the notional amount of credit exposure under these financial instruments.