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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Cash flows from operating activities:      
Net income $ (7,583) $ (20,809) $ (708)
Adjustments to reconcile net income to net cash flows provided by operating activities:      
Depreciation 135,137 102,731 86,504
Amortization of acquisition intangibles 13,016 7,775 1,807
Provision for doubtful accounts 6,693 4,850 5,010
Amortization of debt discount and debt issuance costs 2,014 1,275 530
Loss on disposition of long-lived assets 4,389 2,759 21,572
Stock-based compensation 7,406 6,581 5,912
Deferred income taxes (7,452) (6,612) (7,317)
(Gain) loss on equity investments (5,656) 86 3,427
Loss on pension settlement 1,725    
Goodwill impairment   20,587  
Unrealized gain on foreign currency   (81) 357
Changes in operating assets and liabilities, excluding the effects of acquisitions and dispositions:      
Accounts receivable (10,385) (4,900) (17,774)
Customer receivable (8,713) (32,955)  
Prepaid income taxes 6,206 84 2,218
Accrued taxes 2,981 (3,953) 799
Materials and supplies, prepayments, and other current assets (15,525) (5,297) (18,624)
Accounts payable and accrued liabilities, advance payments and deposits and other current liabilities (125) 11,681 12,597
Other assets (9,979) (226) (8,790)
Other liabilities (11,235) (3,028) (1,236)
Net cash provided by operating activities 102,912 80,548 86,284
Cash flows from investing activities:      
Capital expenditures (160,114) (96,442) (60,358)
Government capital programs - Amounts disbursed (7,905) (9,700) (14,965)
Government capital programs - Amounts received 2,853 7,517 16,316
Purchases of strategic investments (2,750) (6,399) (2,768)
Sale of businesses, net of transferred cash of $0 and $0.9 million, respectively 1,835 18,597  
Acquisition of business net of cash acquired (18,044) (340,152)  
Spectrum deposit refund 1,136    
Proceeds from strategic investments 15,745   11,969
Purchase of spectrum; including deposits (1,068)   (20,396)
Purchase of short-term investments     (116)
Proceeds from sale of assets 1,067   120
Net cash used in investing activities (167,245) (426,579) (70,198)
Cash flows from financing activities:      
Dividends paid on common stock (10,708) (10,813) (10,891)
Distributions to noncontrolling interests (3,531) (7,468) (10,368)
Payment of debt issuance costs (873) (6,568) (1,096)
Finance lease payment (1,069)    
Term loan - repayments (5,222) (8,758) (13,751)
Term loan - borrowings 20,000 210,000  
Revolving credit facility - borrowings 115,250 97,000  
Revolving credit facility - repayments (72,250) (33,500)  
Proceeds from mezzanine equity   71,533  
Proceeds from customer receivable credit facility 15,425 37,321  
Repayment of customer receivable credit facility (4,960) (1,828)  
Purchases of common stock - stock- based compensation (1,169) (1,713) (1,733)
Purchases of common stock - share repurchase plan (942) (10,546) (6,589)
Proceeds from exercise of stock options   383  
Investments made by minority shareholders in consolidated affiliates 22    
Repurchases of noncontrolling interests (4,891) (13,312) (28,939)
Contingent consideration paid for business acquisition (1,718)    
Net cash provided by (used in) financing activities 43,364 321,731 (73,367)
Effect of foreign currency exchange rates on cash and cash equivalents     (80)
Net change in cash, cash equivalents, and restricted cash (20,969) (24,300) (57,361)
Total cash, cash equivalents, and restricted cash, beginning of period 80,697 104,997 162,358
Total cash, cash equivalents, and restricted cash, end of period 59,728 80,697 104,997
Supplemental cash flow information:      
Interest paid 19,924 8,231 4,829
Taxes paid 3,241 3,969 6,117
Dividends declared, not paid 3,310 2,672 2,703
Noncash investing activity:      
Purchases of property, plant and equipment included in accounts payable and accrued expenses $ 27,811 $ 22,093 $ 21,746