CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities:
Net loss	$ (7,717)	$ (3,265)
Adjustments to reconcile net loss to net cash flows provided by operating activities:
Depreciation and amortization	72,621	67,109
Amortization of intangibles from acquisitions	6,391	6,508
Provision for doubtful accounts	2,463	3,153
Amortization of debt discount and debt issuance costs	1,162	1,004
Loss on disposition of long-lived assets	278	3,392
Stock-based compensation	4,517	4,028
Deferred income taxes	(6,616)	(3,871)
Loss on pension settlement	369	1,725
Gain on equity investments	(2,501)	(3,401)
Changes in operating assets and liabilities, excluding the effects of acquisitions and dispositions:
Accounts receivable	1,311	(81)
Customer receivable	1,186	(2,298)
Prepaid income taxes	739	6,206
Accrued taxes	2,563	3,227
Materials and supplies, prepayments, and other current assets	220	(12,868)
Accounts payable and accrued liabilities, advance payments and deposits and other current liabilities	(6,860)	(9,970)
Other assets	(4,552)	(3,291)
Other liabilities	(5,245)	(6,587)
Net cash provided by operating activities	60,329	50,720
Cash flows from investing activities:
Capital expenditures	(89,451)	(71,204)
Government capital programs - Amounts disbursed	(6,986)	(3,894)
Government capital programs - Amounts received	593
Purchases of strategic investments	(1,055)	(1,400)
Sale of businesses, net of transferred cash of $0		1,835
Acquisition of businesses	1,314
Net cash used in investing activities	(95,585)	(74,663)
Cash flows from financing activities:
Dividends paid on common stock	(6,633)	(5,348)
Distributions to noncontrolling interests	(1,447)	(1,375)
Payment of debt issuance costs	(159)
Finance lease payment	(481)	(574)
Term loan - repayments	(2,335)	(938)
Revolving credit facility - borrowings	88,273	49,000
Revolving credit facility - repayments	(26,500)	(24,500)
Proceeds from customer receivable credit facility	4,300	8,000
Repayment of customer receivable credit facility	(3,247)	(2,258)
Purchases of common stock - stock- based compensation	(1,433)	(1,169)
Purchases of common stock - share repurchase plan	(6,828)	(941)
Investments made by minority shareholders in consolidated affiliates		11
Repurchases of noncontrolling interests	(760)	(4,502)
Net cash provided by financing activities	42,750	15,406
Net change in cash, cash equivalents, and restricted cash	7,494	(8,537)
Total cash, cash equivalents, and restricted cash, beginning of period	59,728	80,697
Total cash, cash equivalents, and restricted cash, end of period	67,222	72,160
Noncash investing activity:
Amounts accrued for reimbursable capital expenditures from Government capital programs	11,296	103
Amounts accrued for non-reimbursable capital expenditures	$ 20,433	$ 13,200