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Derivative Instruments and Hedging Activities - Fair Value of Derivative Instruments on the Balance Sheet (Details) $ in Thousands | Dec. 31, 2018 USD ($) contract | Dec. 31, 2017 USD ($) contract
--- | --- | ---
Interest make-whole provisions | Other liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Fair Value ($) | $ 1,808 |
Designated as Hedging Instrument | Interest rate swap contracts | Other assets |  |
Derivatives, Fair Value [Line Items] |  |
Asset derivatives | 703 | $ 233
Designated as Hedging Instrument | Interest rate swap contracts | Other liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Fair Value ($) | $ 3,187 | $ 3,529
Not Designated as Hedging Instrument |  |
Derivatives, Fair Value [Line Items] |  |
Number of instruments | contract | 4 | 1
Not Designated as Hedging Instrument | Interest rate swap contracts | Other assets |  |
Derivatives, Fair Value [Line Items] |  |
Asset derivatives | $ 30 | $ 0
Not Designated as Hedging Instrument | Commodity swap contracts | Other assets |  |
Derivatives, Fair Value [Line Items] |  |
Asset derivatives | 33 | 0
Not Designated as Hedging Instrument | Commodity swap contracts | Other liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Fair Value ($) | 70 | 0
Not Designated as Hedging Instrument | Interest make-whole provisions | Other assets |  |
Derivatives, Fair Value [Line Items] |  |
Fair Value ($) | $ 1,808 | $ 0

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- Definition Fair value, before 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 elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=109247956&loc=SL51823488-111719 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959 + Details
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- Definition Fair value, before 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 elected not to be offset. Excludes liabilities not subject to a master netting arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=109247956&loc=SL51823488-111719 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313 + Details
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