CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net loss	$ (18,754)	$ (7,583)	$ (20,809)
Adjustments to reconcile net loss to net cash flows provided by operating activities:
Depreciation and amortization	141,627	135,137	102,731
Amortization of intangibles	12,636	13,016	7,775
Provision for doubtful accounts	5,012	6,693	4,850
Amortization of debt discount and debt issuance costs	2,431	2,014	1,275
(Gain) loss on disposition of assets and contingent consideration	1,699	4,387	2,759
Stock-based compensation	8,535	7,406	6,581
Deferred income taxes	(16,756)	(7,452)	(6,612)
Loss on pension settlement	369	1,725
(Gain) loss on investments	(4,201)	(5,656)	86
Goodwill impairment	0	0	20,587
Unrealized gain on foreign currency			(81)
Changes in operating assets and liabilities, excluding the effects of acquisitions and dispositions:
Accounts receivable	(19,785)	(10,385)	(4,900)
Customer receivable	(416)	(8,713)	(32,955)
Prepaid income taxes	739	6,206	84
Accrued taxes	7,062	2,981	(3,953)
Materials and supplies, prepayments, and other current assets	7,666	(15,525)	(5,297)
Accounts payable and accrued liabilities, advance payments and deposits and other current liabilities	2,430	(125)	11,681
Other assets	(10,079)	(9,979)	(226)
Other liabilities	(8,583)	(11,235)	(3,028)
Net cash provided by operating activities	111,632	102,912	80,548
Cash flows from investing activities:
Capital expenditures	(163,297)	(160,114)	(96,442)
Government capital programs - Amounts disbursed	(32,871)	(7,905)	(9,700)
Government capital programs - Amounts received	31,873	2,853	7,517
Purchases of strategic investments	(1,055)	(2,750)	(6,399)
Sale of businesses, net of transferred cash of $0		1,835	18,597
Spectrum sales and deposits refunded	576	1,136
Proceeds from strategic investments		15,745
Purchase of spectrum; including deposits		(1,068)
Acquisition of businesses	1,314	(18,044)	(340,152)
Purchase of investments - employee benefit plan	(2,124)
Proceeds from investments - employee benefit plan	472
Proceeds from sale of assets		1,067
Net cash used in investing activities	(165,112)	(167,245)	(426,579)
Cash flows from financing activities:
Dividends paid on common stock	(13,178)	(10,708)	(10,813)
Distributions to noncontrolling interests	(4,039)	(3,531)	(7,468)
Payment of debt issuance costs	(3,906)	(873)	(6,568)
Finance lease payments	(1,375)	(1,069)
Term loan - repayments	(6,959)	(5,222)	(8,758)
Term loan - borrowings	130,000	20,000	210,000
Revolving credit facility - borrowings	159,414	115,250	97,000
Revolving credit facility - repayments	(185,293)	(72,250)	(33,500)
Proceeds from mezzanine equity			71,533
Proceeds from customer receivable credit facility	7,300	15,425	37,321
Repayment of customer receivable credit facility	(6,712)	(4,960)	(1,828)
Purchases of common stock - stock- based compensation	(1,473)	(1,169)	(1,713)
Purchases of common stock - share repurchase plan	(14,999)	(942)	(10,546)
Proceeds from exercise of stock options			383
Investments made by minority shareholders in consolidated affiliates		22
Repurchases of noncontrolling interests	(2,861)	(4,891)	(13,312)
Contingent consideration paid for business acquisition		(1,718)
Net cash provided by financing activities	55,919	43,364	321,731
Net change in cash, cash equivalents, and restricted cash	2,439	(20,969)	(24,300)
Total cash, cash equivalents, and restricted cash, beginning of period	59,728	80,697	104,997
Total cash, cash equivalents, and restricted cash, end of period	62,167	59,728	80,697
Supplemental cash flow information:
Interest paid	39,251	19,924	8,231
Taxes paid	2,898	3,241	3,969
Dividends declared, not paid	3,701	3,310	2,672
Noncash investing activity:
Amounts accrued for reimbursable capital expenditures from government capital programs	31,769
Amounts accrued for non-reimbursable capital expenditures	$ 25,521	$ 27,811	$ 22,093