UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash Flows From Operating Activities
Net income	$ 28,756	$ 25,234
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	51,985	46,569
Amortization	1,134	2,145
Provision for bad debt	1,335	1,155
Stock based compensation expense	1,893	1,850
Excess tax benefits on stock awards	(655)	(395)
Deferred income taxes	(7,463)	(6,261)
Net loss on disposal of equipment	229	1,739
Realized loss on disposal of investments	20	0
Unrealized (gain) loss on investments	190	(40)
Net gains from patronage and equity investments	(540)	(667)
Amortization of long term debt issuance costs	430	453
Other	323	1,295
(Increase) decrease in:
Accounts receivable	(2,989)	(3,078)
Materials and supplies	286	3,111
Income taxes receivable	14,752	14,434
Other assets	(3,990)	354
Increase (decrease) in:
Accounts payable	(4,174)	2,411
Deferred lease payable	733	760
Income taxes payable	1,675	0
Other deferrals and accruals	(807)	269
Net cash provided by operating activities	83,123	91,338
Cash Flows From Investing Activities
Acquisition of property, plant and equipment	(39,644)	(51,197)
Proceeds from sale of equipment	242	390
Cash distributions from investments	38	40
Net cash used in investing activities	(39,364)	(50,767)
Cash Flows From Financing Activities
Principal payments on long-term debt	(17,250)	0
Cash paid for debt issuance costs	(7,820)	0
Excess tax benefits on stock awards	655	395
Repurchases of stock	(1,799)	(1,785)
Proceeds from issuances of stock	826	1,146
Net cash used in financing activities	(25,388)	(244)
Net increase in cash and cash equivalents	18,371	40,327
Cash and cash equivalents:
Beginning	68,917	38,316
Ending	87,288	78,643
Cash payments for:
Interest	5,550	5,927
Income taxes paid	$ 10,235	$ 8,825