CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 101,651	$ 85,086
Accounts receivable, net of allowance for doubtful accounts of $533 and $534, respectively	63,541	54,407
Income taxes receivable	10,306	5,282
Inventory, net of allowances of $66 and $113, respectively	5,728	5,265
Prepaid expenses and other	57,805	60,162
Total current assets	239,031	210,202
Investments	12,388	10,788
Property, plant and equipment, net	700,114	701,359
Intangible assets, net	314,147	366,029
Goodwill	149,070	146,497
Operating lease right-of-use assets	392,589	0
Deferred charges and other assets	53,352	49,891
Total assets	1,860,691	1,484,766
Current liabilities:
Current maturities of long-term debt, net of unamortized loan fees	31,650	20,618
Accounts payable	40,295	35,987
Advanced billings and customer deposits	8,358	7,919
Accrued compensation	10,075	9,452
Current operating lease liabilities	42,567
Accrued liabilities and other	14,391	14,563
Total current liabilities	147,336	88,539
Long-term debt, less current maturities, net of unamortized loan fees	688,464	749,624
Other long-term liabilities:
Deferred income taxes	136,451	127,453
Deferred lease		22,436
Asset retirement obligations	36,914	28,584
Benefit plan obligations	12,675	11,519
Noncurrent operating lease liabilities	352,439
Other liabilities	16,990	14,364
Total other long-term liabilities	555,469	204,356
Commitments and contingencies (Note 13)
Shareholders’ equity:
Common stock, no par value, authorized 96,000; 49,671 and 49,630 issued and outstanding at December 31, 2019 and 2018, respectively	0	0
Additional paid in capital	42,110	47,456
Retained earnings	427,004	386,511
Accumulated other comprehensive income, net of taxes	308	8,280
Total shareholders’ equity	469,422	442,247
Total liabilities and shareholders’ equity	$ 1,860,691	$ 1,484,766