UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net income	$ 51,521	$ 13,280
Income from discontinued operations, net of tax	48,472	13,130
Income from continuing operations	3,049	150
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	13,043	11,931
Amortization	223	154
Accretion of asset retirement obligations	93	81
Bad debt expense	137	205
Stock based compensation expense, net of amount capitalized	642	2,739
Deferred income taxes	5,256	(385)
Gain from patronage and investments	(432)	(338)
Changes in assets and liabilities:
Accounts receivable	1,861	2,998
Current income taxes	(4,334)	(388)
Operating lease right-of-use assets	669	666
Other assets	(5,824)	(1,732)
Accounts payable	(281)	1,262
Lease liabilities	(929)	(416)
Other deferrals and accruals	(4,037)	(3,673)
Net cash provided by operating activities - continuing operations	9,136	13,254
Net cash provided by operating activities - discontinued operations	75,530	47,854
Net cash provided by operating activities	84,666	61,108
Cash flows from investing activities:
Capital expenditures	(39,482)	(23,362)
Proceeds from sale of assets and other	14	263
Net cash used in investing activities - continuing operations	(39,468)	(23,099)
Net cash used in investing activities - discontinued operations	(882)	(8,926)
Net cash used in investing activities	(40,350)	(32,025)
Cash flows from financing activities:
Taxes paid for equity award issuances	(1,486)	(1,945)
Payments for financing arrangements and other	(496)	(27)
Net cash used in financing activities - continuing operations	(1,982)	(1,972)
Net cash used in financing activities - discontinued operations	(8,549)	(8,530)
Net cash used in financing activities	(10,531)	(10,502)
Net increase in cash and cash equivalents	33,785	18,581
Cash and cash equivalents, beginning of period	195,397	101,651
Cash and cash equivalents, end of period	$ 229,182	$ 120,232