Condensed Financial Information of Registrant - Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 112,221	$ 68,309
Restricted cash	4,000	2,000
Total cash, cash equivalents, and restricted cash	116,221	70,309	$ 128,428	$ 75,819
Prepaid and other current assets	28,525	24,648
Total current assets	1,130,171	636,469
Property, plant, and equipment
Property, plant, and equipment	1,180,397	1,183,878
Less accumulated depreciation, depletion, and amortization	(323,892)	(251,113)
Property, plant, and equipment, net	856,505	932,765
Long-term assets
Operating lease right-of-use (“ROU”) assets	383,824	357,166
Other long-term assets	56,255	60,572
Total assets	2,570,251	2,133,861	2,700,560
Current liabilities
Current maturities of long-term debt	10,841	59,933
Accounts payable	154,543	106,945
Accrued taxes	28,641	27,440
Operating lease liabilities	53,640	56,965
Other accrued liabilities	370,424	203,711
Total current liabilities	1,355,793	878,680
Long-term liabilities
Long-term debt, net of current maturities	553,717	648,660
Finance lease liabilities	7,691	7,925
Operating lease liabilities	335,094	304,355
Other liabilities	52,256	47,967
Total liabilities	2,304,551	1,887,587
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, 2021 and December 31, 2020, 60,161,955 shares and 54,002,538 shares issued at December 31, 2021 and December 31, 2020, respectively	602	540
Additional paid-in capital	821,713	726,504
Accumulated deficit	(559,117)	(477,028)
Accumulated other comprehensive income (loss)	2,502	(3,742)
Total stockholders’ equity	265,700	246,274	648,242	512,329
Total liabilities and stockholders’ equity	2,570,251	2,133,861
Parent Company
Current assets
Cash and cash equivalents	4,086	480
Restricted cash	330	330
Total cash, cash equivalents, and restricted cash	4,416	810	$ 7,052	$ 29,444
Prepaid and other current assets	15,664	16,983
Due from subsidiaries	94,676	107,995
Total current assets	114,756	125,788
Property, plant, and equipment
Property, plant, and equipment	19,535	21,477
Less accumulated depreciation, depletion, and amortization	(13,869)	(14,368)
Property, plant, and equipment, net	5,666	7,109
Long-term assets
Operating lease right-of-use (“ROU”) assets	3,280	3,714
Investment in subsidiaries	207,483	209,010
Other long-term assets	724	723
Total assets	331,909	346,344
Current liabilities
Current maturities of long-term debt	0	47,301
Accounts payable	1,386	2,401
Accrued taxes	48	49
Operating lease liabilities	608	750
Other accrued liabilities	9,805	10,907
Due to subsidiaries	50,195	33,757
Total current liabilities	62,042	95,165
Long-term liabilities
Long-term debt, net of current maturities	0	0
Finance lease liabilities	17	77
Operating lease liabilities	4,150	4,783
Other liabilities	0	45
Total liabilities	66,209	100,070
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, 2021 and December 31, 2020, 60,161,955 shares and 54,002,538 shares issued at December 31, 2021 and December 31, 2020, respectively	602	540
Additional paid-in capital	821,713	726,504
Accumulated deficit	(559,117)	(477,028)
Accumulated other comprehensive income (loss)	2,502	(3,742)
Total stockholders’ equity	265,700	246,274
Total liabilities and stockholders’ equity	$ 331,909	$ 346,344