UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash Flows From Operating Activities
Net income	$ 20,760	$ 17,231
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	33,189	30,325
Amortization	812	1,658
Provision for bad debt	905	550
Stock based compensation expense	1,430	1,560
Excess tax benefits on stock awards	(450)	(394)
Deferred income taxes	(3,656)	(4,983)
Net (gain) loss on disposal of equipment	227	(313)
Unrealized (gain) loss on investments	(54)	(74)
Net gains from patronage and equity investments	(385)	(289)
Amortization of long term debt issuance costs	289	300
Other	647	133
(Increase) decrease in:
Accounts receivable	(339)	(1,570)
Materials and supplies	(414)	3,120
Income taxes receivable	14,752	17,157
Other assets	(3,421)	950
Increase (decrease) in:
Accounts payable	(2,911)	2,367
Income taxes payable	499	0
Deferred lease payable	506	502
Other deferrals and accruals	(2,116)	(1,654)
Net cash provided by operating activities	60,270	66,576
Cash Flows From Investing Activities
Acquisition of property, plant and equipment	(25,135)	(32,804)
Proceeds from sale of equipment	52	223
Cash distributions from investments	3	27
Net cash used in investing activities	(25,080)	(32,554)
Cash Flows From Financing Activities
Principal payments on long-term debt	(11,500)	0
Excess tax benefits on stock awards	450	394
Repurchases of stock	(1,450)	(1,771)
Proceeds from issuances of stock	530	1,124
Net cash used in financing activities	(11,970)	(253)
Net increase in cash and cash equivalents	23,220	33,769
Cash and cash equivalents:
Beginning	68,917	38,316
Ending	92,137	72,085
Cash payments for:
Interest	3,782	3,930
Income taxes paid (refunded)	$ 2,139	$ (580)