Fair Value Measurements - (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Financial assets:
Securities available for sale	$ 696,885	$ 674,248
Trust preferred securities
Financial assets:
Securities available for sale	17,823	18,389
Other debt securities
Financial assets:
Securities available for sale	22,656	22,145
Obligations of other U.S. Government agencies and corporations
Financial assets:
Securities available for sale	2,149	2,158
Government agency mortgage backed securities \| Residential mortgage-backed securities
Financial assets:
Securities available for sale	411,255	409,317
Government agency mortgage backed securities \| Commercial mortgage-backed securities
Financial assets:
Securities available for sale	50,872	50,863
Government agency collateralized mortgage obligations \| Residential mortgage-backed securities
Financial assets:
Securities available for sale	190,386	168,826
Government agency collateralized mortgage obligations \| Commercial mortgage-backed securities
Financial assets:
Securities available for sale	1,744	2,550
Recurring
Financial assets:
Securities available for sale	696,885	674,248
Derivative instruments	6,982	9,108
Total financial assets	862,486	861,222
Financial liabilities:
Derivative instruments	6,524	5,910
Total financial liabilities	6,524	5,910
Recurring \| Interest rate swaps
Financial liabilities:
Derivative instruments	3,134	3,410
Recurring \| Interest rate contracts
Financial assets:
Derivative instruments	1,713	1,985
Financial liabilities:
Derivative instruments	1,713	1,985
Recurring \| Interest rate lock commitments
Financial assets:
Derivative instruments	5,252	2,643
Financial liabilities:
Derivative instruments	2
Recurring \| Forward commitments
Financial assets:
Derivative instruments	17	4,480
Financial liabilities:
Derivative instruments	1,675	269
Recurring \| Mortgage loans held for sale
Financial assets:
Mortgage loans held for sale	158,619	177,866
Recurring \| Trust preferred securities
Financial assets:
Securities available for sale	17,823	18,389
Recurring \| Other debt securities
Financial assets:
Securities available for sale	22,656	22,145
Recurring \| Obligations of other U.S. Government agencies and corporations
Financial assets:
Securities available for sale	2,149	2,158
Recurring \| Government agency mortgage backed securities \| Residential mortgage-backed securities
Financial assets:
Securities available for sale	411,255	409,317
Recurring \| Government agency mortgage backed securities \| Commercial mortgage-backed securities
Financial assets:
Securities available for sale	50,872	50,863
Recurring \| Government agency collateralized mortgage obligations \| Residential mortgage-backed securities
Financial assets:
Securities available for sale	190,386	168,826
Recurring \| Government agency collateralized mortgage obligations \| Commercial mortgage-backed securities
Financial assets:
Securities available for sale	1,744	2,550
Recurring \| Level 1
Financial assets:
Securities available for sale	0	0
Derivative instruments	0	0
Total financial assets	0	0
Financial liabilities:
Derivative instruments	0	0
Total financial liabilities	0	0
Recurring \| Level 1 \| Interest rate swaps
Financial liabilities:
Derivative instruments	0	0
Recurring \| Level 1 \| Interest rate contracts
Financial assets:
Derivative instruments	0	0
Financial liabilities:
Derivative instruments	0	0
Recurring \| Level 1 \| Interest rate lock commitments
Financial assets:
Derivative instruments	0	0
Financial liabilities:
Derivative instruments	0
Recurring \| Level 1 \| Forward commitments
Financial assets:
Derivative instruments	0	0
Financial liabilities:
Derivative instruments	0	0
Recurring \| Level 1 \| Mortgage loans held for sale
Financial assets:
Mortgage loans held for sale	0	0
Recurring \| Level 1 \| Trust preferred securities
Financial assets:
Securities available for sale	0	0
Recurring \| Level 1 \| Other debt securities
Financial assets:
Securities available for sale	0	0
Recurring \| Level 1 \| Obligations of other U.S. Government agencies and corporations
Financial assets:
Securities available for sale	0	0
Recurring \| Level 1 \| Government agency mortgage backed securities \| Residential mortgage-backed securities
Financial assets:
Securities available for sale	0	0
Recurring \| Level 1 \| Government agency mortgage backed securities \| Commercial mortgage-backed securities
Financial assets:
Securities available for sale	0	0
Recurring \| Level 1 \| Government agency collateralized mortgage obligations \| Residential mortgage-backed securities
Financial assets:
Securities available for sale	0	0
Recurring \| Level 1 \| Government agency collateralized mortgage obligations \| Commercial mortgage-backed securities
Financial assets:
Securities available for sale	0	0
Recurring \| Level 2
Financial assets:
Securities available for sale	679,062	655,859
Derivative instruments	6,982	9,108
Total financial assets	844,663	842,833
Financial liabilities:
Derivative instruments	6,524	5,910
Total financial liabilities	6,524	5,910
Recurring \| Level 2 \| Interest rate swaps
Financial liabilities:
Derivative instruments	3,134	3,410
Recurring \| Level 2 \| Interest rate contracts
Financial assets:
Derivative instruments	1,713	1,985
Financial liabilities:
Derivative instruments	1,713	1,985
Recurring \| Level 2 \| Interest rate lock commitments
Financial assets:
Derivative instruments	5,252	2,643
Financial liabilities:
Derivative instruments	2
Recurring \| Level 2 \| Forward commitments
Financial assets:
Derivative instruments	17	4,480
Financial liabilities:
Derivative instruments	1,675	269
Recurring \| Level 2 \| Mortgage loans held for sale
Financial assets:
Mortgage loans held for sale	158,619	177,866
Recurring \| Level 2 \| Trust preferred securities
Financial assets:
Securities available for sale	0	0
Recurring \| Level 2 \| Other debt securities
Financial assets:
Securities available for sale	22,656	22,145
Recurring \| Level 2 \| Obligations of other U.S. Government agencies and corporations
Financial assets:
Securities available for sale	2,149	2,158
Recurring \| Level 2 \| Government agency mortgage backed securities \| Residential mortgage-backed securities
Financial assets:
Securities available for sale	411,255	409,317
Recurring \| Level 2 \| Government agency mortgage backed securities \| Commercial mortgage-backed securities
Financial assets:
Securities available for sale	50,872	50,863
Recurring \| Level 2 \| Government agency collateralized mortgage obligations \| Residential mortgage-backed securities
Financial assets:
Securities available for sale	190,386	168,826
Recurring \| Level 2 \| Government agency collateralized mortgage obligations \| Commercial mortgage-backed securities
Financial assets:
Securities available for sale	1,744	2,550
Recurring \| Level 3
Financial assets:
Securities available for sale	17,823	18,389
Derivative instruments	0	0
Total financial assets	17,823	18,389
Financial liabilities:
Derivative instruments	0	0
Total financial liabilities	0	0
Recurring \| Level 3 \| Interest rate swaps
Financial liabilities:
Derivative instruments	0	0
Recurring \| Level 3 \| Interest rate contracts
Financial assets:
Derivative instruments	0	0
Financial liabilities:
Derivative instruments	0	0
Recurring \| Level 3 \| Interest rate lock commitments
Financial assets:
Derivative instruments	0	0
Financial liabilities:
Derivative instruments	0
Recurring \| Level 3 \| Forward commitments
Financial assets:
Derivative instruments	0	0
Financial liabilities:
Derivative instruments	0	0
Recurring \| Level 3 \| Mortgage loans held for sale
Financial assets:
Mortgage loans held for sale	0	0
Recurring \| Level 3 \| Trust preferred securities
Financial assets:
Securities available for sale	17,823	18,389
Recurring \| Level 3 \| Other debt securities
Financial assets:
Securities available for sale	0	0
Recurring \| Level 3 \| Obligations of other U.S. Government agencies and corporations
Financial assets:
Securities available for sale	0	0
Recurring \| Level 3 \| Government agency mortgage backed securities \| Residential mortgage-backed securities
Financial assets:
Securities available for sale	0	0
Recurring \| Level 3 \| Government agency mortgage backed securities \| Commercial mortgage-backed securities
Financial assets:
Securities available for sale	0	0
Recurring \| Level 3 \| Government agency collateralized mortgage obligations \| Residential mortgage-backed securities
Financial assets:
Securities available for sale	0	0
Recurring \| Level 3 \| Government agency collateralized mortgage obligations \| Commercial mortgage-backed securities
Financial assets:
Securities available for sale	$ 0	$ 0

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

+ Details

Name:	us-gaap_AssetsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

Name:	us-gaap_AssetsFairValueDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=65884222&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26610-111562

+ Details

Name:	us-gaap_AvailableForSaleSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13495-108611

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226008-175313

+ Details

Name:	us-gaap_DerivativeAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226008-175313

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13495-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

+ Details

Name:	us-gaap_DerivativeLiabilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Fair value of financial and nonfinancial obligations.

+ References

+ Details

Name:	us-gaap_LiabilitiesFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

Name:	us-gaap_LiabilitiesFairValueDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value portion of mortgage loans held-for-sale.

+ References

No definition available.

+ Details

Name:	us-gaap_MortgagesHeldForSaleFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant