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Derivative Financial Instruments and Hedging Activities - Narrative (Details) - Fair value hedge $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2015 USD ($) derivative | Sep. 30, 2014 USD ($) | Sep. 30, 2015 USD ($) derivative | Sep. 30, 2014 USD ($) | Dec. 31, 2014 USD ($)
Derivatives, Fair Value [Line Items] |  |  |  |  |
Net hedge ineffectiveness, derivatives | $ 79 | $ (48) | $ 21 | $ 125 |
Designated as hedging instrument |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Accrued interest on swaps | $ 34 |  | $ 34 |  | $ 41
Interest rate swap | Designated as hedging instrument |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Number of derivative instruments | derivative | 8 |  | 8 |  |
Interest rate swap | Designated as hedging instrument | Other assets |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Interest rate contracts notional amount, Asset derivatives | $ 0 |  | $ 0 |  | 4,589
Interest rate swap | Designated as hedging instrument | Other liabilities |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Interest rate contracts notional amount, Liability derivatives | 29,999 |  | 29,999 |  | 26,899
Interest income |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
(Decrease) increase in value of designated interest rate swaps recognized in interest income | (813) | 21 | (393) | 334 |
Payment on interest rate swaps recorded in interest income | (231) | (251) | (700) | (755) |
Increase (decrease) in value of hedged loans recognized in interest income | 905 | (54) | 453 | (133) |
Decrease in value of yield maintenance agreement recognized against interest income | (13) | (15) | (39) | (77) |
Net loss on derivatives recognized against interest income | (152) | $ (299) | (679) | $ (631) |
Assets and liabilities at fair value measured on a recurring basis | Interest rate contract | Designated as hedging instrument | Other assets |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Interest rate contracts fair value, Asset derivatives | 0 |  | 0 |  | 61
Assets and liabilities at fair value measured on a recurring basis | Interest rate contract | Designated as hedging instrument | Other liabilities |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Interest rate contracts fair value, Liability derivatives | $ 2,328 |  | $ 2,328 |  | $ 1,996

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- Definition Nominal or face amount used to calculate payments on the derivative asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5579245-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Notional Amount -URI http://asc.fasb.org/extlink&oid=6519104 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5580258-113959 + Details
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- 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=49121117&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=49121117&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
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