Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement Of Cash Flows [Abstract]
Net loss attributable to Covia Holdings Corporation	$ (941)	$ (52,245)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, depletion, and amortization	34,830	58,095
Amortization of deferred financing costs	1,237	1,490
Gain on disposal of fixed assets	(815)
Deferred income tax benefit	(665)	(8,596)
Stock compensation expense	1,650	2,767
Net loss from non-controlling interest	(24)	(3)
Other, net	(2,277)	150
Change in operating assets and liabilities:
Accounts receivable	12,070	(44,525)
Inventories	2,060	2,785
Prepaid expenses and other assets	(23,517)	7,703
Accounts payable	40	(6,364)
Accrued expenses	(24,376)	(16,339)
Net cash used in operating activities	(728)	(55,082)
Cash flows from investing activities
Capital expenditures	(8,297)	(32,881)
Capitalized interest	(752)	(3,283)
Proceeds from sale of fixed assets	1,083
Net cash used in investing activities	(7,966)	(36,164)
Cash flows from financing activities
Payments on Term Loan	(7,931)	(4,125)
Payments on other long-term debt	(35)	(87)
Payments on finance lease liabilities	(1,182)	(1,120)
Tax payments for withholdings on share-based awards exercised or distributed	(183)	(357)
Net cash used in financing activities	(9,331)	(5,689)
Effect of foreign currency exchange rate changes	(3,295)	97
Decrease in cash and cash equivalents	(21,320)	(96,838)
Cash and cash equivalents
Beginning of period	319,484	134,130
End of period	298,164	37,292
Supplemental disclosure of cash flow information:
Interest paid, net of capitalized interest	(25,503)	(23,698)
Income taxes (paid) refunded	83	(2,332)
Non-cash increase in asset retirement obligations	6,474
Non-cash investing activities:
Capital expenditures and capitalized interest in accounts payable and accrued expenses	2,369	18,738
Right-of-use assets obtained in exchange for lease liabilities	$ 169	$ 411,191