Allowance for Loan Losses - Recorded Investment Segregated By Amounts Individually Or Collectively In Allowance For Loan Losses (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Total financing receivables	$ 974,768	$ 985,399
Balance, end of period: Individually evaluated for impairment	42,138	34,640
Balance, end of period: Collectively evaluated for impairment	932,630	950,759
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Total financing receivables	326,735	329,534
Balance, end of period: Individually evaluated for impairment	17,123	15,248
Balance, end of period: Collectively evaluated for impairment	309,612	314,286
Real Estate Construction One-To- Four Family
Financing Receivable, Allowance for Credit Losses [Line Items]
Total financing receivables	42,371	44,488
Balance, end of period: Individually evaluated for impairment	3,972	0
Balance, end of period: Collectively evaluated for impairment	38,399	44,488
Real Estate Construction Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total financing receivables	83,784	74,931
Balance, end of period: Individually evaluated for impairment	1,912	0
Balance, end of period: Collectively evaluated for impairment	81,872	74,931
Real Estate Term Owner Occupied
Financing Receivable, Allowance for Credit Losses [Line Items]
Total financing receivables	128,933	128,763
Balance, end of period: Individually evaluated for impairment	17,123	17,229
Balance, end of period: Collectively evaluated for impairment	111,810	111,534
Real Estate Term Non-Owner Occupied
Financing Receivable, Allowance for Credit Losses [Line Items]
Total financing receivables	303,885	314,069
Balance, end of period: Individually evaluated for impairment	695	825
Balance, end of period: Collectively evaluated for impairment	303,190	313,244
Real Estate Term Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total financing receivables	36,945	38,029
Balance, end of period: Individually evaluated for impairment	776	790
Balance, end of period: Collectively evaluated for impairment	36,169	37,239
Consumer Secured By 1st Deed Of Trust
Financing Receivable, Allowance for Credit Losses [Line Items]
Total financing receivables	24,992	26,673
Balance, end of period: Individually evaluated for impairment	537	548
Balance, end of period: Collectively evaluated for impairment	24,455	26,125
Consumer Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total financing receivables	27,123	28,912
Balance, end of period: Individually evaluated for impairment	0	0
Balance, end of period: Collectively evaluated for impairment	$ 27,123	$ 28,912