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Fair Value Measurements (Tables) | 9 Months Ended
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Sep. 30, 2018
Fair Value [Abstract] |
Assets and Liabilities Measured at Fair Value on Recurring Basis | The Company’s assets and liabilities measured at fair value on a recurring basis at September 30, 2018 and December 31, 2017, were as follows:
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Fair Value Measurement at September 30, 2018 Using
﻿ |  | Total |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3)
﻿Interest rate swap derivative instruments – net asset position |  | $ | 37,214 |  | $ | - |  | $ | 37,214 |  | $ | -
﻿Fuel hedge derivative instrument – net asset position |  | $ | 2,189 |  | $ | - |  | $ | - |  | $ | 2,189
﻿Restricted cash and investments |  | $ | 126,221 |  | $ | - |  | $ | 126,221 |  | $ | -
﻿Contingent consideration |  | $ | (55,024) |  | $ | - |  | $ | - |  | $ | (55,024)
﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Fair Value Measurement at December 31, 2017 Using
﻿ |  | Total |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3)
﻿Interest rate swap derivative instruments – net asset position |  | $ | 18,979 |  | $ | - |  | $ | 18,979 |  | $ | -
﻿Fuel hedge derivative instrument – net asset position |  | $ | 3,880 |  | $ | - |  | $ | - |  | $ | 3,880
﻿Restricted cash and investments |  | $ | 165,592 |  | $ | - |  | $ | 165,592 |  | $ | -
﻿Contingent consideration |  | $ | (47,285) |  | $ | - |  | $ | - |  | $ | (47,285)
﻿
Change in Fair Value for Level 3 Derivatives | The following table summarizes the changes in the fair value for Level 3 derivatives for the nine months ended September 30, 2018 and 2017: ﻿
﻿ |  |  |  |  |
﻿ | Nine Months Ended September 30,
﻿ |  | 2018 |  |  | 2017
﻿Beginning balance | $ | 3,880 |  | $ | (264)
﻿Realized (gains) losses included in earnings |  | (4,647) |  |  | 2,765
﻿Unrealized gains (losses) included in AOCIL |  | 2,956 |  |  | (1,672)
﻿Ending balance | $ | 2,189 |  | $ | 829
﻿ |  |  |  |  |
﻿
Fair Value for Level 3 Liabilities | The following table summarizes the changes in the fair value for Level 3 liabilities related to contingent consideration for the nine months ended September 30, 2018 and 2017:
﻿ |  |  |  |  |
﻿ | Nine Months Ended September 30,
﻿ |  | 2018 |  |  | 2017
﻿Beginning balance | $ | 47,285 |  | $ | 51,826
﻿Contingent consideration recorded at acquisition date |  | 11,669 |  |  | 35
﻿Payment of contingent consideration recorded at acquisition date |  | (5,459) |  |  | (5,840)
﻿Payment of contingent consideration recorded in earnings |  | (11) |  |  | -
﻿Adjustments to contingent consideration |  | 349 |  |  | 17,754
﻿Reclass earned contingent consideration to accrued liabilities |  | - |  |  | (20,464)
﻿Interest accretion expense |  | 1,308 |  |  | 1,381
﻿Foreign currency translation adjustment |  | (117) |  |  | 263
﻿Ending balance | $ | 55,024 |  | $ | 44,955
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﻿

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- Definition Tabular disclosure of the fair value measurement of financial instruments classified in shareholders' equity using significant unobservable inputs (level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of level 3 (for example, transfers due to changes in the observability of significant inputs) by class of equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19279-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19279-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258 + Details
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