Loans and Allowance for Loan Losses - Credit Quality Indicators by Portfolio Class (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	$ 1,970,974	$ 1,848,784
Pass
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	1,868,353	1,744,392
Watch
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	64,763	65,807
Substandard
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	37,858	38,585
Commercial and Industrial
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	423,704	386,233
Commercial and Industrial | Pass
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	382,189	351,046
Commercial and Industrial | Watch
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	39,404	31,074
Commercial and Industrial | Substandard
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	2,111	4,113
Construction
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	282,727	245,905
Construction | Pass
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	275,094	236,588
Construction | Watch
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	2,701	4,612
Construction | Substandard
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	4,932	4,705
Residential Real Estate | 1-to-4 Family Mortgage
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	307,152	294,924
Residential Real Estate | Residential Line of Credit
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	177,783	177,190
Residential Real Estate | Multi-Family Mortgage
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	52,810	44,977
Residential Real Estate | Pass | 1-to-4 Family Mortgage
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	291,280	277,948
Residential Real Estate | Pass | Residential Line of Credit
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	174,178	173,011
Residential Real Estate | Pass | Multi-Family Mortgage
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	51,642	43,770
Residential Real Estate | Watch | 1-to-4 Family Mortgage
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	5,135	6,945
Residential Real Estate | Watch | Residential Line of Credit
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	1,424	1,875
Residential Real Estate | Watch | Multi-Family Mortgage
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	143	152
Residential Real Estate | Substandard | 1-to-4 Family Mortgage
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	10,737	10,031
Residential Real Estate | Substandard | Residential Line of Credit
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	2,181	2,304
Residential Real Estate | Substandard | Multi-Family Mortgage
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	1,025	1,055
Commercial Real Estate | Owner Occupied
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	371,462	357,346
Commercial Real Estate | Non-Owner Occupied
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	273,285	267,902
Commercial Real Estate | Pass | Owner Occupied
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	353,275	338,698
Commercial Real Estate | Pass | Non-Owner Occupied
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	259,588	249,877
Commercial Real Estate | Watch | Owner Occupied
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	9,293	10,459
Commercial Real Estate | Watch | Non-Owner Occupied
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	6,216	10,273
Commercial Real Estate | Substandard | Owner Occupied
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	8,894	8,189
Commercial Real Estate | Substandard | Non-Owner Occupied
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	7,481	7,752
Consumer and Other
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	82,051	74,307
Consumer and Other | Pass
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	81,107	73,454
Consumer and Other | Watch
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	447	417
Consumer and Other | Substandard
Financing Receivable Allowance For Credit Losses [Line Items]
Gross loans	$ 497	$ 436