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Condended Financial Information of Registrant Statements of Operations (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Operating expenses |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | $ 52,642 | $ 45,989 | $ 31,617
General and administrative expense (excluding depreciation) |  |  |  |  |  |  |  |  | 47,426 | 46,078 | 42,073
Acquisition and integration costs |  |  |  |  |  |  |  |  | 10,319 | 395 | 5,294
Total operating expenses |  |  |  |  |  |  |  |  | 3,328,787 | 2,349,105 | 1,884,694
Operating income (loss) | $ 20,408 | $ 4,894 | $ 28,983 | $ 27,656 | $ 21,605 | $ 26,716 | $ 16,451 | $ 29,189 | 81,941 | 93,961 | (19,649)
Other income (expense) |  |  |  |  |  |  |  |  |  |  |
Interest expense and financing costs, net |  |  |  |  |  |  |  |  | (39,768) | (31,632) | (28,506)
Other income (expense), net |  |  |  |  |  |  |  |  | 1,046 | 911 | (10)
Change in value of common stock warrants |  |  |  |  |  |  |  |  | 1,801 | (1,674) | 2,962
Equity earnings (losses) of subsidiaries |  |  |  |  |  |  |  |  | 9,464 | 18,369 | (22,381)
Total other expense, net |  |  |  |  |  |  |  |  | (42,181) | (22,659) | (34,098)
Income (loss) before income taxes |  |  |  |  |  |  |  |  | 39,760 | 71,302 | (53,747)
Income tax benefit (expense) |  |  |  |  |  |  |  |  | (333) | 1,319 | 7,912
Net income (loss) | $ 13,886 | $ (5,822) | $ 16,178 | $ 15,185 | $ 19,005 | $ 18,824 | $ 7,006 | $ 27,786 | 39,427 | 72,621 | (45,835)
Parent Company |  |  |  |  |  |  |  |  |  |  |
Operating expenses |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 4,092 | 2,871 | 2,205
General and administrative expense (excluding depreciation) |  |  |  |  |  |  |  |  | 20,721 | 18,922 | 15,618
Acquisition and integration costs |  |  |  |  |  |  |  |  | 10,118 | 192 | 4,781
Total operating expenses |  |  |  |  |  |  |  |  | 34,931 | 21,985 | 22,604
Operating income (loss) |  |  |  |  |  |  |  |  | (34,931) | (21,985) | (22,604)
Other income (expense) |  |  |  |  |  |  |  |  |  |  |
Interest expense and financing costs, net |  |  |  |  |  |  |  |  | (10,867) | (13,709) | (18,246)
Debt extinguishment and commitment costs |  |  |  |  |  |  |  |  | 0 | (1,804) | 0
Interest income from subsidiaries |  |  |  |  |  |  |  |  | 0 | 0 | 583
Other income (expense), net |  |  |  |  |  |  |  |  | 1,155 | 631 | 67
Change in value of common stock warrants |  |  |  |  |  |  |  |  | 1,801 | (1,674) | 2,962
Equity earnings (losses) of subsidiaries |  |  |  |  |  |  |  |  | 81,942 | 111,162 | (17,170)
Total other expense, net |  |  |  |  |  |  |  |  | 74,031 | 94,606 | (31,804)
Income (loss) before income taxes |  |  |  |  |  |  |  |  | 39,100 | 72,621 | (54,408)
Income tax benefit (expense) |  |  |  |  |  |  |  |  | 327 | 0 | 8,573
Net income (loss) |  |  |  |  |  |  |  |  | $ 39,427 | $ 72,621 | $ (45,835)

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- Definition Represents the charge against earnings during the period for commitment fees and debt issuance expenses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(12)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(10)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66022249&loc=d3e33749-111570 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(13)(f)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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