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Interest Rate Derivatives (Tables) | 12 Months Ended
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Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of key terms and fair values of interest rate swap derivatives | The following table sets forth the key terms and fair values of our interest rate swap derivatives, each of which was designated as a cash flow hedge of interest rate risk (dollars in thousands):
Notional Amount |  |  |  |  |  | Effective Date |  | Expiration Date |  | Fair Value at December 31,
| Fixed Rate |  | Floating Rate Index |  |  |  | 2018 |  | 2017
$ | 100,000 |  |  | 1.7300 | % |  | One-Month LIBOR |  | 9/1/2015 |  | 8/1/2019 |  | $ | 472 |  |  | $ | 252 |
12,834 |  | (1) | 1.3900 | % |  | One-Month LIBOR |  | 10/13/2015 |  | 10/1/2020 |  | 239 |  |  | 213 |
100,000 |  |  | 1.9013 | % |  | One-Month LIBOR |  | 9/1/2016 |  | 12/1/2022 |  | 1,968 |  |  | 1,046 |
100,000 |  |  | 1.9050 | % |  | One-Month LIBOR |  | 9/1/2016 |  | 12/1/2022 |  | 1,967 |  |  | 1,051 |
50,000 |  |  | 1.9079 | % |  | One-Month LIBOR |  | 9/1/2016 |  | 12/1/2022 |  | 971 |  |  | 511 |
75,000 |  |  | 3.1760 | % |  | Three-Month LIBOR |  | 6/30/2020 |  | 6/30/2030 |  | (2,676 | ) |  | — |
75,000 |  |  | 3.1920 | % |  | Three-Month LIBOR |  | 6/30/2020 |  | 6/30/2030 |  | (2,783 | ) |  | — |
|  |  |  |  |  |  |  |  |  |  |  | $ | 158 |  |  | $ | 3,073 |
(1) The notional amount of this instrument is scheduled to amortize to $12.1 million.
Schedule of fair value and balance sheet classification of interest rate derivatives | The table below sets forth the fair value of our interest rate derivatives as well as their classification on our consolidated balance sheets (in thousands):
|  |  |  | Fair Value at December 31,
Derivatives |  | Balance Sheet Location |  | 2018 |  | 2017
Interest rate swaps designated as cash flow hedges |  | Interest rate derivatives |  | $ | 5,617 |  |  | $ | 3,073 |
Interest rate swaps designated as cash flow hedges |  | Other liabilities |  | (5,459 | ) |  | — |
Schedule of effect of interest rate derivatives on consolidated statements of operations and comprehensive income | The table below presents the effect of our interest rate derivatives on our consolidated statements of operations and comprehensive income (in thousands):
|  | Amount of (Loss) Gain Recognized in AOCI on Derivatives |  | Amount of Gain (Loss) Reclassified from AOCI into Interest Expense on Statement of Operations
|  | For the Years Ended December 31, |  | For the Years Ended December 31,
Derivatives in Hedging Relationships |  | 2018 |  | 2017 |  | 2016 |  | 2018 |  | 2017 |  | 2016
Interest rate derivatives |  | $ | (2,373 | ) |  | $ | 684 |  |  | $ | (2,915 | ) |  | $ | 407 |  |  | $ | (3,304 | ) |  | $ | (4,230 | )

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- Definition Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4E -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624181-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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- Definition Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109980867&loc=d3e41620-113959 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109980867&loc=d3e41638-113959 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109980867&loc=d3e41678-113959 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109980867&loc=d3e41641-113959 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(n)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579240-113959 + Details
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