Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Cash flows from operating activities:
Net loss	$ (84,546)	$ (69,132)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	30,664	29,073
Stock-based compensation	4,280	3,891
Interest accretion on notes payable	320	338
Loss on debt extinguishment	1,019
Amortization of debt issuance costs	856	1,007
Other, including (gain) loss on disposal of assets	1,546	1,053
Decrease in accounts receivable	35,159	22,544
Increase in inventories, prepaid expenses and other current assets	(30,794)	(27,147)
Decrease in deposits and other assets	2,208	534
Decrease in ROU operating leases	2,437	3,823
Increase in accounts payable, deferred revenue, accrued liabilities and other long-term liabilities	1,223	22,655
Increase (decrease) in operating lease liabilities	2,204	(836)
Decrease in accrued interest payable	(5,715)	(4,422)
Deferred income taxes	(21,248)	(24,204)
Net cash used in operating activities	(60,387)	(40,823)
Cash flows from investing activities:
Additions to property and equipment	(53,458)	(48,083)
Property insurance recoveries	2,042	624
Net cash used in investing activities	(51,416)	(47,459)
Cash flows from financing activities:
Repayment of borrowings	(117,510)	(25,000)
Proceeds from borrowings	105,000	147,000
Payment of cash dividends	(21,367)	(69,093)
Proceeds from issuance of common stock	421	10,858
Stock repurchases	(6)	(4)
Net cash (used in) provided by financing activities	(33,462)	63,761
Effect of exchange rate on cash	(6,103)	347
Net decrease in cash and cash equivalents	(151,368)	(24,174)
Cash and cash equivalents at beginning of period	174,179	44,608	$ 44,608
Cash and cash equivalents at end of period	22,811	20,434	$ 174,179
Supplemental cash flow information
Cash paid for interest	31,987	31,708
Cash paid for income taxes	$ 1,959	$ 5,310