Condensed Financial Information of Registrant Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 126,015	$ 75,076
Restricted cash	2,413	743
Total cash, cash equivalents, and restricted cash	128,428	75,819	$ 119,077	$ 49,018
Prepaid and other current assets	59,156	28,370
Total current assets	1,032,174	586,592
Property, plant, and equipment
Property, plant, and equipment	1,146,983	649,768
Less accumulated depreciation, depletion, and amortization	(185,040)	(111,507)
Property, plant, and equipment, net	961,943	538,261
Long-term assets
Operating lease assets	420,073
Other long-term assets	21,997	21,881
Total assets	2,700,560	1,460,734	1,347,407
Current liabilities
Accounts payable	162,402	54,787
Operating lease liabilities	79,999
Other accrued liabilities	84,744	54,562
Total current liabilities	1,034,322	507,201
Long-term liabilities
Long-term debt, net of current maturities	599,634	392,607
Common stock warrants	8,206	5,007
Finance lease liabilities	6,227
Finance lease liabilities		6,123
Operating lease liabilities	340,909
Other liabilities	63,020	37,467
Total liabilities	2,052,318	948,405
Stockholders’ equity
Preferred stock, $0.01 par value: 3,000,000 shares authorized, none issued	0	0
Common stock, $0.01 par value; 500,000,000 shares authorized at December 31, 2019 and December 31, 2018, 53,254,151 shares and 46,983,924 shares issued at December 31, 2019 and December 31, 2018, respectively	533	470
Additional paid-in capital	715,069	617,937
Accumulated deficit	(67,942)	(108,751)
Accumulated other comprehensive income	582	2,673
Total stockholders’ equity	648,242	512,329	447,719	368,909
Total liabilities and stockholders’ equity	2,700,560	1,460,734
Parent Company
Current assets
Cash and cash equivalents	6,309	28,701
Restricted cash	743	743
Total cash, cash equivalents, and restricted cash	7,052	29,444	$ 66,359	$ 11,107
Prepaid and other current assets	12,325	11,711
Due from subsidiaries	180,686	43,928
Total current assets	200,063	85,083
Property, plant, and equipment
Property, plant, and equipment	20,961	18,939
Less accumulated depreciation, depletion, and amortization	(12,117)	(9,034)
Property, plant, and equipment, net	8,844	9,905
Long-term assets
Operating lease assets	4,276
Investment in subsidiaries	636,742	638,975
Other long-term assets	1,128	3,334
Total assets	851,053	737,297
Current liabilities
Accounts payable	2,597	8,312
Operating lease liabilities	698
Other accrued liabilities	14,591	12,349
Due to subsidiaries	125,778	96,963
Total current liabilities	143,664	117,624
Long-term liabilities
Long-term debt, net of current maturities	44,783	100,411
Common stock warrants	8,206	5,007
Finance lease liabilities	223
Finance lease liabilities		475
Operating lease liabilities	5,629
Other liabilities	306	1,451
Total liabilities	202,811	224,968
Stockholders’ equity
Preferred stock, $0.01 par value: 3,000,000 shares authorized, none issued	0	0
Common stock, $0.01 par value; 500,000,000 shares authorized at December 31, 2019 and December 31, 2018, 53,254,151 shares and 46,983,924 shares issued at December 31, 2019 and December 31, 2018, respectively	533	470
Additional paid-in capital	715,069	617,937
Accumulated deficit	(67,942)	(108,751)
Accumulated other comprehensive income	582	2,673
Total stockholders’ equity	648,242	512,329
Total liabilities and stockholders’ equity	$ 851,053	$ 737,297