Fair Value Measurements - Recurring (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Assets:
Securities available-for-sale	$ 399,252us-gaap_AvailableForSaleSecurities	$ 385,486us-gaap_AvailableForSaleSecurities
Mortgage servicing rights	5,254us-gaap_ServicingAssetAtFairValueAmount	5,462us-gaap_ServicingAssetAtFairValueAmount
U.S. Treasury
Assets:
Securities available-for-sale	1,525	1,527
U.S. government agencies
Assets:
Securities available-for-sale	1,611	1,624
States and political subdivisions
Assets:
Securities available-for-sale	33,746	22,018
Corporate bonds
Assets:
Securities available-for-sale	33,004	30,985
Collateralized mortgage obligations
Assets:
Securities available-for-sale	68,093	63,627
Asset-backed securities
Assets:
Securities available-for-sale	168,256	173,496
Collateralized loan obligations
Assets:
Securities available-for-sale	93,017	92,209
Level 1
Assets:
Securities available-for-sale	1,525	1,527
Level 2
Assets:
Securities available-for-sale	397,609	330,900
Loans held-for-sale	7,038	5,072
Level 3
Assets:
Securities available-for-sale	118	53,059
Recurring \| Level 1
Assets:
Total financial assets	1,525	1,527
Recurring \| Level 1 \| U.S. Treasury
Assets:
Securities available-for-sale	1,525	1,527
Recurring \| Level 2
Assets:
Loans held-for-sale	7,038	5,072
Total financial assets	405,009	336,145
Liabilities:
Total	66	30
Recurring \| Level 2 \| Interest rate swap agreements net of swap credit valuation
Assets:
Other assets	66	30
Liabilities:
Other liabilities	66	30
Recurring \| Level 2 \| Forward MBS contracts and forward loan contracts
Assets:
Other assets	296	143
Recurring \| Level 2 \| U.S. government agencies
Assets:
Securities available-for-sale	1,611	1,624
Recurring \| Level 2 \| States and political subdivisions
Assets:
Securities available-for-sale	33,628	21,900
Recurring \| Level 2 \| Corporate bonds
Assets:
Securities available-for-sale	33,004	30,985
Recurring \| Level 2 \| Collateralized mortgage obligations
Assets:
Securities available-for-sale	68,093	63,627
Recurring \| Level 2 \| Asset-backed securities
Assets:
Securities available-for-sale	168,256	120,555
Recurring \| Level 2 \| Collateralized loan obligations
Assets:
Securities available-for-sale	93,017	92,209
Recurring \| Level 3
Assets:
Mortgage servicing rights	5,254	5,462
Total financial assets	5,372	58,521
Recurring \| Level 3 \| States and political subdivisions
Assets:
Securities available-for-sale	118	118
Recurring \| Level 3 \| Asset-backed securities
Assets:
Securities available-for-sale		52,941
Recurring \| Total
Assets:
Loans held-for-sale	7,038	5,072
Mortgage servicing rights	5,254	5,462
Total financial assets	411,906	396,193
Liabilities:
Total	66	30
Recurring \| Total \| Interest rate swap agreements net of swap credit valuation
Assets:
Other assets	66	30
Liabilities:
Other liabilities	66	30
Recurring \| Total \| Forward MBS contracts and forward loan contracts
Assets:
Other assets	296	143
Recurring \| Total \| U.S. Treasury
Assets:
Securities available-for-sale	1,525	1,527
Recurring \| Total \| U.S. government agencies
Assets:
Securities available-for-sale	1,611	1,624
Recurring \| Total \| States and political subdivisions
Assets:
Securities available-for-sale	33,746	22,018
Recurring \| Total \| Corporate bonds
Assets:
Securities available-for-sale	33,004	30,985
Recurring \| Total \| Collateralized mortgage obligations
Assets:
Securities available-for-sale	68,093	63,627
Recurring \| Total \| Asset-backed securities
Assets:
Securities available-for-sale	168,256	173,496
Recurring \| Total \| Collateralized loan obligations
Assets:
Securities available-for-sale	$ 93,017	$ 92,209

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=36462937&loc=d3e19207-110258

+ Details

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

- 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=28360136&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=27724398&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=6871852&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 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13433-108611

Reference 2: 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 3: 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=35750535&loc=d3e13495-108611

Reference 4: 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=34720828&loc=SL20225862-175312

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 210

-SubTopic 20

-Section 55

-Paragraph 10

-URI http://asc.fasb.org/extlink&oid=36459792&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

+ 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

- Details

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

- Definition

Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

+ References

No definition available.

+ Details

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

- Definition

Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 50

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122625-111746

+ Details

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

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_AssetBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_CollateralizedLoanObligationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_CollateralizedMortgageObligationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_CorporateBondSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: