CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Cash flows from operating activities:
Net income	$ (1,957)	$ 4,276
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation	33,292	20,111
Amortization of acquisition intangibles	3,258	397
Provision for doubtful accounts	1,913	1,122
Amortization of debt discount and debt issuance costs	501	168
Stock-based compensation	1,461	1,336
Deferred income taxes	191	(2,504)
Gain on equity investments	(4,222)	(2,188)
Loss on disposition of long-lived assets	3,420	117
Unrealized gain on foreign currency		(81)
Changes in operating assets and liabilities, excluding the effects of acquisitions and dispositions:
Accounts receivable	1,677	1,430
Customer receivable	(746)	(12,579)
Materials and supplies, prepayments, and other current assets	(5,330)	(253)
Prepaid income taxes	6,206
Accounts payable and accrued liabilities, advance payments and deposits and other current liabilities	(27,465)	(7,648)
Accrued taxes	2,763	1,810
Other assets	(325)	(242)
Other liabilities	(3,249)	51
Net cash provided by operating activities	11,388	5,323
Cash flows from investing activities:
Capital expenditures	(34,220)	(19,495)
Reimbursable capital expenditures	(248)	(6,185)
Receipt of capital government grants		3,292
Divestiture of businesses, net of transferred cash of $0.9 million		18,597
Purchases of strategic investments		(4,155)
Net cash used in investing activities	(34,468)	(7,946)
Cash flows from financing activities:
Dividends paid on common stock	(2,672)	(2,703)
Distributions to noncontrolling interests	(263)	(3,530)
Payment of debt issuance costs		53
Finance lease payment	(338)
Term loan - repayments	(938)	(938)
Revolving credit facility - borrowings	36,500
Revolving credit facility - repayments	(15,500)
Repayment of customer receivable credit facility	(1,003)
Purchases of common stock - stock- based compensation	(1,136)	(1,677)
Purchases of common stock - share repurchase plan	(941)	(540)
Repurchases of noncontrolling interests	(2,481)	(11,522)
Proceeds from customer receivable credit facility	8,000	10,814
Net cash provided by (used in) financing activities of continuing operations	19,228	(10,043)
Net change in cash, cash equivalents, and restricted cash	(3,852)	(12,666)
Total cash, cash equivalents, and restricted cash, beginning of period	80,697	104,997	$ 104,997
Total cash, cash equivalents, and restricted cash, end of period	76,845	92,331	$ 80,697
Noncash investing activity:
Purchases of property, plant and equipment included in accounts payable and accrued expenses	$ 13,221	$ 10,075