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Derivative Financial Instruments (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Derivative [Line Items] |  |  |  |  |
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax | $ (2,302) | $ (2,442) | $ 3,508 | $ (18,521) |
Amount reclassified from accumulated other comprehensive loss | 1,034 | 2,484 | 2,069 | 3,909 |
Interest Expense | 35,812 | $ 40,375 | 72,748 | $ 77,811 |
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months |  |  | 3,700 |  |
Fair Value, Measurements, Recurring [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Interest Rate Cash Flow Hedge Liability at Fair Value | (4,729) |  | (4,729) |  | $ (9,291)
Fair Value Inputs Level 2 [Member] | Fair Value, Measurements, Recurring [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Interest Rate Cash Flow Hedge Liability at Fair Value | (4,729) |  | (4,729) |  | (9,291)
Interest Rate Cash Flow Hedge Derivative At Fair Value Net | (4,729) |  | $ (4,729) |  | (9,291)
Derivative @ 1.053% 265.000M [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative, Inception Date |  |  | Aug. 01, 2016 |  |
Derivative, Maturity Date |  |  | Jan. 05, 2022 |  |
Derivative, Notional Amount | $ 265,000 |  | $ 265,000 |  |
Derivative, Description of Variable Rate Basis |  |  | 1 Month LIBOR with Floor |  |
Derivative, Fixed Interest Rate | 1.053% |  | 1.053% |  |
Interest Rate Cash Flow Hedge Liability at Fair Value |  |  |  |  | (2,472)
Derivative @ 1.303% 19.678M [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative, Inception Date |  |  | Apr. 07, 2016 |  |
Derivative, Maturity Date |  |  | Apr. 01, 2023 |  |
Derivative, Notional Amount | $ 19,219 |  | $ 19,219 |  |
Derivative, Description of Variable Rate Basis |  |  | 1 Month LIBOR |  |
Derivative, Fixed Interest Rate | 1.303% |  | 1.303% |  |
Interest Rate Cash Flow Hedge Liability at Fair Value | $ (360) |  | $ (360) |  | (494)
Derivative @ 1.490% 32.809M [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative, Inception Date |  |  | Dec. 01, 2016 |  |
Derivative, Maturity Date |  |  | Nov. 01, 2023 |  |
Derivative, Notional Amount | $ 32,069 |  | $ 32,069 |  |
Derivative, Description of Variable Rate Basis |  |  | 1 Month LIBOR |  |
Derivative, Fixed Interest Rate | 1.49% |  | 1.49% |  |
Interest Rate Cash Flow Hedge Liability at Fair Value | $ (851) |  | $ (851) |  | (1,181)
Derivative @ 1.542% 24.000M [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative, Inception Date |  |  | Sep. 17, 2019 |  |
Derivative, Maturity Date |  |  | Mar. 17, 2025 |  |
Derivative, Notional Amount | $ 24,000 |  | $ 24,000 |  |
Derivative, Description of Variable Rate Basis |  |  | 1 Month LIBOR |  |
Derivative, Fixed Interest Rate | 1.542% |  | 1.542% |  |
Interest Rate Cash Flow Hedge Liability at Fair Value | $ (812) |  | $ (812) |  | (1,288)
Derivative @ 2.366% 37.022M [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative, Inception Date |  |  | Jun. 02, 2017 |  |
Derivative, Maturity Date |  |  | Jun. 02, 2027 |  |
Derivative, Notional Amount | $ 36,306 |  | $ 36,306 |  |
Derivative, Description of Variable Rate Basis |  |  | 1 Month LIBOR with Floor |  |
Derivative, Fixed Interest Rate | 2.366% |  | 2.366% |  |
Interest Rate Cash Flow Hedge Liability at Fair Value | $ (2,706) |  | $ (2,706) |  | $ (3,856)

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- Definition The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121549185&loc=d3e80748-113994 + Details
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- Definition Reference to the index or unit of measurement for the underlying which establishes the pricing terms of the derivative instrument. For example, the basis on the underlying for a natural gas futures contract might be the NYMEX price per million British thermal units (MMBtu). + References No definition available. + Details
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