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Combined Guarantor Subsidiaries - Combined Statements of Owners' Equity - USD ($)
Total
Guarantor Subsidiaries
Beginning balance at Dec. 31, 2016   $ 1,187,580,000
Increase (Decrease) in Partners' Capital [Roll Forward]    
Net income (loss) $ 158,982,000 131,922,000
Contributions   462,726,000
Distributions   (296,064,000)
Ending balance at Dec. 31, 2017   1,486,164,000
Increase (Decrease) in Partners' Capital [Roll Forward]    
Net income (loss) (99,229,000) 113,051,000
Contributions   93,977,000
Distributions   (288,569,000)
Ending balance at Dec. 31, 2018   1,404,623,000
Increase (Decrease) in Partners' Capital [Roll Forward]    
Net income (loss) $ (131,721,000) 94,159,000
Contributions   86,170,000
Distributions   (216,877,000)
Noncash distributions   (11,504,000)
Ending balance at Dec. 31, 2019   $ 1,356,571,000