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Allowance For Loan Losses - Recorded Investment Segregated By Amounts Individually Or Collectively In Allowance For Loan Losses (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total financing receivables $ 959,823 $ 979,449
Individually evaluated for impairment 31,967 38,656
Collectively evaluated for impairment 927,856 940,793
Commercial    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total financing receivables 313,769 278,178
Individually evaluated for impairment 26,812 18,657
Collectively evaluated for impairment 286,957 259,521
Real estate construction one-to-four family    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total financing receivables 31,201 26,061
Individually evaluated for impairment 0 0
Collectively evaluated for impairment 31,201 26,061
Real estate construction other    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total financing receivables 80,093 72,159
Individually evaluated for impairment 0 0
Collectively evaluated for impairment 80,093 72,159
Real estate term owner occupied    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total financing receivables 132,098 152,178
Individually evaluated for impairment 2,862 16,946
Collectively evaluated for impairment 129,236 135,232
Real estate term non-owner occupied    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total financing receivables 319,459 356,601
Individually evaluated for impairment 874 1,084
Collectively evaluated for impairment 318,585 355,517
Real estate term other    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total financing receivables 40,411 45,402
Individually evaluated for impairment 559 1,302
Collectively evaluated for impairment 39,852 44,100
Consumer secured by 1st deeds of trust    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total financing receivables 22,873 23,589
Individually evaluated for impairment 860 615
Collectively evaluated for impairment 22,013 22,974
Consumer other    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total financing receivables 19,919 25,281
Individually evaluated for impairment 0 52
Collectively evaluated for impairment $ 19,919 $ 25,229