UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash Flows From Operating Activities
Net income	$ 13,881	$ 10,286
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	17,454	15,931
Amortization	285	406
Provision for bad debt	345	321
Stock based compensation expense	1,048	825
Excess tax benefits on stock awards	0	(357)
Deferred income taxes	(1,489)	(1,610)
Net (gain) loss on disposal of equipment	(15)	11
Unrealized gains on investments	(16)	(38)
Net gains from patronage and equity investments	(210)	(202)
Amortization of long term debt issuance costs	132	146
Other	3,039	226
(Increase) decrease in:
Accounts receivable	2,470	1,773
Materials and supplies	(267)	(1,467)
Income taxes receivable	6,981	9,319
Other assets	988	(3,896)
Increase (decrease) in:
Accounts payable	1,895	(5,827)
Deferred lease payable	208	249
Other deferrals and accruals	(3,559)	(2,275)
Net cash provided by operating activities	43,170	23,821
Cash Flows From Investing Activities
Acquisition of property, plant and equipment	(20,537)	(9,500)
Proceeds from sale of equipment	145	24
Cash distributions from investments	45	0
Cash disbursed for acquisition	(2,480)	0
Net cash used in investing activities	(22,827)	(9,476)
Cash Flows From Financing Activities
Principal payments on long-term debt	(5,750)	(5,750)
Cash paid for debt issuance costs	(1,528)	0
Excess tax benefits on stock awards	0	357
Repurchases of common stock	(3,526)	(763)
Proceeds from issuances of common stock	2,809	46
Net cash used in financing activities	(7,995)	(6,110)
Net increase in cash and cash equivalents	12,348	8,235
Cash and cash equivalents:
Beginning	76,812	68,917
Ending	89,160	77,152
Cash payments for:
Interest	1,632	1,905
Income taxes paid (refunded)	$ 876	$ (850)