CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income (loss)	$ (106,693)	$ 37,302	$ (19,931)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	300,597	324,864	381,237
Deferred income taxes	5,504	8,386	(5,249)
Cash distributions from wireless partnerships in excess of (less than) current earnings	1,195	844	(1,901)
Pension and post-retirement contributions in excess of expense	(33,208)	(37,301)	(24,507)
Stock-based compensation expense	10,097	7,533	6,836
Amortization of deferred financing costs and discounts	15,622	7,871	4,932
Noncash interest expense on convertible security interest	30,927	7,875
Loss (gain) on extinguishment of debt	17,101	10,629	(4,510)
Loss (gain) on change in fair value of contingent payment rights	86,476	(23,802)
Loss on impairment of assets held for sale	5,704
Other, net	3,226	(2,501)	1,487
Changes in operating assets and liabilities:
Accounts receivable, net	4,103	(4,993)	13,120
Income tax receivable	(62)	3,103	9,908
Prepaid expenses and other assets	(12,863)	(7,457)	(1,546)
Accounts payable	(189)	(5,653)	(1,566)
Accrued expenses and other liabilities	(8,670)	38,280	(19,214)
Net cash provided by operating activities	318,867	364,980	339,096
Cash flows from investing activities:
Purchases of property, plant and equipment, net	(480,346)	(217,563)	(232,203)
Purchase of investments	(175,764)
Proceeds from sale of assets	3,469	7,071	14,718
Proceeds from sale and maturity of investments	66,198	426	329
Other			(663)
Net cash used in investing activities	(586,443)	(210,066)	(217,819)
Cash flows from financing activities:
Proceeds from bond offering	400,000	750,000
Proceeds from issuance of long-term debt	150,000	1,271,250	195,000
Proceeds from issuance of common stock	75,000	350,000
Payment of finance lease obligations	(6,365)	(9,020)	(12,519)
Payment on long-term debt	(397,000)	(1,867,838)	(195,350)
Retirement of senior notes		(444,717)	(49,804)
Payment of financing costs	(8,266)	(59,139)
Share repurchases for minimum tax withholding	(1,719)	(812)	(363)
Dividends on common stock			(55,445)
Other		(1,472)
Net cash provided by (used in) financing activities	211,650	(11,748)	(118,481)
Change in cash and cash equivalents	(55,926)	143,166	2,796
Cash and cash equivalents at beginning of period	155,561	12,395	9,599
Cash and cash equivalents at end of period	$ 99,635	$ 155,561	$ 12,395