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Loans and Allowance for Loan Losses - Credit Quality of Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 1,339,205	$ 1,363,351
Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	5,071	5,192
Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,286,491	1,293,968
Pass | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	2,211	2,210
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	24,909	33,146
Special Mention | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	1,027	1,140
Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	27,805	36,237
Substandard | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	1,833	1,842
Commercial loans | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	184,829	209,899
Total loans	185,020	210,223
Commercial loans | Commercial and industrial | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	191	324
Commercial loans | Commercial and industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	171,350	197,659
Commercial loans | Commercial and industrial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	10,334	6,776
Commercial loans | Commercial and industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	3,145	5,464
Commercial real estate loans | Commercial real estate, owner-occupied
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	232,049	227,989
Total loans	235,121	230,605
Commercial real estate loans | Commercial real estate, owner-occupied | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	3,071	2,616
Commercial real estate loans | Commercial real estate, owner-occupied | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	210,225	205,820
Commercial real estate loans | Commercial real estate, owner-occupied | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	11,004	10,406
Commercial real estate loans | Commercial real estate, owner-occupied | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	10,820	11,763
Commercial real estate loans | Commercial real estate, investor
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	661,622	671,325
Total loans	663,357	673,499
Commercial real estate loans | Commercial real estate, investor | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	1,735	2,174
Commercial real estate loans | Commercial real estate, investor | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	654,056	651,548
Commercial real estate loans | Commercial real estate, investor | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	2,116	13,304
Commercial real estate loans | Commercial real estate, investor | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	5,450	6,473
Commercial real estate loans | Construction
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	48,748	48,402
Total loans	48,754	48,413
Commercial real estate loans | Construction | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	6	11
Commercial real estate loans | Construction | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	45,471	41,710
Commercial real estate loans | Construction | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	0	1,008
Commercial real estate loans | Construction | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	3,277	5,684
Residential loans | Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	115,426	110,721
Total loans	115,493	110,788
Residential loans | Home equity | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	68	67
Residential loans | Home equity | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	113,616	107,933
Residential loans | Home equity | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	428	322
Residential loans | Home equity | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	1,382	2,466
Residential loans | Other residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	73,721	73,035
Residential loans | Other residential | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	0	0
Residential loans | Other residential | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	72,123	70,987
Residential loans | Other residential | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Residential loans | Other residential | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,598	2,048
Consumer loans | Installment and other consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	17,739	16,788
Consumer loans | Installment and other consumer | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	0	0
Consumer loans | Installment and other consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	17,439	16,101
Consumer loans | Installment and other consumer | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	190
Consumer loans | Installment and other consumer | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 300	$ 497

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Loans and Leases Receivable, Net of Deferred Income, Excluding Purchased Credit-impaired Loans

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Reference 1: http://www.xbrl.org/2003/role/presentationRef



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