CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net income (loss)	$ 29,558	$ (14,498)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	163,804	196,547
Cash distributions from wireless partnerships in excess of (less than) current earnings	144	(1,212)
Pension and post-retirement contributions in excess of expense	(15,985)	(12,612)
Stock-based compensation expense	3,224	3,312
Amortization of deferred financing costs	2,406	2,439
Gain on extinguishment of debt	(234)	(249)
Other, net	(4,230)	795
Changes in operating assets and liabilities:
Accounts receivable, net	3,379	(399)
Income tax receivable	9,093	(7,460)
Prepaid expenses and other assets	2,320	(967)
Accounts payable	(14,229)	12,244
Accrued expenses and other liabilities	2,471	(14,678)
Net cash provided by operating activities	181,721	163,262
Cash flows from investing activities:
Purchases of property, plant and equipment, net	(96,237)	(119,768)
Proceeds from sale of assets	6,073	14,203
Proceeds from sale of investments	426	329
Other		(450)
Net cash used in investing activities	(89,738)	(105,686)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	40,000	107,000
Payment of finance lease obligations	(5,119)	(6,811)
Payment on long-term debt	(89,175)	(97,175)
Repurchase of senior notes	(4,208)	(4,294)
Dividends on common stock		(55,445)
Net cash used in financing activities	(58,502)	(56,725)
Change in cash and cash equivalents	33,481	851
Cash and cash equivalents at beginning of period	12,395	9,599
Cash and cash equivalents at end of period	$ 45,876	$ 10,450