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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Cash flows from operating activities:      
Net loss $ (7,055) $ (1,957)  
Adjustments to reconcile net loss to net cash flows provided by operating activities:      
Depreciation and amortization 36,404 33,292  
Amortization of intangibles from acquisitions 3,247 3,258  
Provision for doubtful accounts 1,378 1,913  
Amortization of debt discount and debt issuance costs 569 501  
(Gain) loss on disposition of long-lived assets (167) 3,420  
Stock-based compensation 1,778 1,461  
Deferred income taxes (1,953) 191  
Loss on pension settlement 369    
Gain on equity investments (315) (4,222)  
Changes in operating assets and liabilities, excluding the effects of acquisitions and dispositions:      
Accounts receivable 3,573 1,677  
Customer receivable 745 (746)  
Prepaid income taxes 679 6,206  
Accrued taxes 6,953 2,763  
Materials and supplies, prepayments, and other current assets (3,503) (5,330)  
Accounts payable and accrued liabilities, advance payments and deposits and other current liabilities (24,548) (27,465)  
Other assets 141 (325)  
Other liabilities (2,283) (3,249)  
Net cash provided by operating activities 16,012 11,388 $ 102,900
Cash flows from investing activities:      
Capital expenditures (50,598) (34,220)  
Government capital programs - Amounts disbursed (2,127) (248)  
Government capital programs - Amounts received 593    
Purchases of strategic investments (630)    
Net cash used in investing activities (52,762) (34,468)  
Cash flows from financing activities:      
Dividends paid on common stock (3,310) (2,672)  
Distributions to noncontrolling interests   (263)  
Payment of debt issuance costs (119)    
Finance lease payment (249) (338)  
Term loan - repayments (1,171) (938)  
Revolving credit facility - borrowings 57,553 36,500  
Revolving credit facility - repayments (14,000) (15,500)  
Proceeds from customer receivable credit facility 4,300 8,000  
Repayment of customer receivable credit facility (1,570) (1,003)  
Purchases of common stock - stock- based compensation (1,433) (1,136)  
Purchases of common stock - share repurchase plan (1,407) (941)  
Repurchases of noncontrolling interests (595) (2,481)  
Net cash provided by financing activities 37,999 19,228  
Net change in cash, cash equivalents, and restricted cash 1,249 (3,852)  
Total cash, cash equivalents, and restricted cash, beginning of period 59,728 80,697 80,697
Total cash, cash equivalents, and restricted cash, end of period 60,977 76,845 $ 59,728
Noncash investing activity:      
Purchases of property, plant and equipment included in accounts payable and accrued expenses $ 16,208 $ 13,221