Annual report pursuant to Section 13 and 15(d)

Condensed Consolidating Financial Information - Cash Flows (Details)

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Condensed Consolidating Financial Information - Cash Flows (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items]      
Net cash provided by operating activities $ 723,993 $ 786,271 $ 679,889
Net cash provided by (used in) investing activities (674,771) (676,874) (2,474,168)
Net cash (used in) provided by financing activities (95,459) (156,657) 432,961
Net (decrease) increase in cash, cash equivalents and restricted cash (46,237) (47,260) (1,361,318)
Cash, cash equivalents and restricted cash at beginning of period 52,297 99,557 1,460,875
Cash, cash equivalents and restricted cash at end of period 6,060 52,297 99,557
Eliminations      
Condensed Financial Statements, Captions [Line Items]      
Net cash provided by operating activities 3 1 0
Net cash provided by (used in) investing activities 432 2,318 1,419,417
Net cash (used in) provided by financing activities (435) (2,319) (1,419,417)
Net (decrease) increase in cash, cash equivalents and restricted cash 0 0 0
Cash, cash equivalents and restricted cash at beginning of period 0 0 0
Cash, cash equivalents and restricted cash at end of period 0 0 0
Parent      
Condensed Financial Statements, Captions [Line Items]      
Net cash provided by operating activities 64,037 560,203 392,680
Net cash provided by (used in) investing activities 8,605 (445,869) (2,216,615)
Net cash (used in) provided by financing activities (95,459) (156,657) 432,961
Net (decrease) increase in cash, cash equivalents and restricted cash (22,817) (42,323) (1,390,974)
Cash, cash equivalents and restricted cash at beginning of period 25,585 67,908 1,458,882
Cash, cash equivalents and restricted cash at end of period 2,768 25,585 67,908
Guarantors      
Condensed Financial Statements, Captions [Line Items]      
Net cash provided by operating activities 656,443 226,067 287,209
Net cash provided by (used in) investing activities (680,057) (231,005) (1,674,690)
Net cash (used in) provided by financing activities 0 0 1,417,137
Net (decrease) increase in cash, cash equivalents and restricted cash (23,614) (4,938) 29,656
Cash, cash equivalents and restricted cash at beginning of period 26,711 31,649 1,993
Cash, cash equivalents and restricted cash at end of period 3,097 26,711 31,649
Non-Guarantor      
Condensed Financial Statements, Captions [Line Items]      
Net cash provided by operating activities 3,510 0 0
Net cash provided by (used in) investing activities (3,751) (2,318) (2,280)
Net cash (used in) provided by financing activities 435 2,319 2,280
Net (decrease) increase in cash, cash equivalents and restricted cash 194 1 0
Cash, cash equivalents and restricted cash at beginning of period 1 0 0
Cash, cash equivalents and restricted cash at end of period $ 195 $ 1 $ 0