UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash Flows from Operating Activities
Net income	$ 17,231	$ 16,193
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	30,325	27,714
Amortization	1,658	2,328
Provision for bad debt	550	952
Stock based compensation expense	1,730	1,045
Excess tax benefits on stock awards	(394)	(61)
Deferred income taxes	(4,983)	253
Net (gain) loss on disposal of equipment	(313)	167
Realized gain on disposal of investments	0	(2)
Unrealized gains on investments	(74)	(103)
Net gains from patronage and equity investments	(289)	(311)
Other	263	1,152
(Increase) decrease in:
Accounts receivable	(1,570)	(722)
Materials and supplies	3,120	1,778
Income taxes receivable	16,576	(84)
Increase (decrease) in:
Accounts payable	2,367	2,444
Deferred lease payable	502	679
Income taxes payable	581	0
Other prepaids, deferrals and accruals	(704)	(1,267)
Net cash provided by operating activities	66,576	52,155
Cash Flows from Investing Activities
Purchase and construction of property, plant and equipment	(32,804)	(48,482)
Proceeds from sale of assets	0	25
Proceeds from sale of equipment	223	290
(Purchase) sale of investment securities	0	(12)
Proceeds from sale of investment securities	27	64
Net cash used in investing activities	(32,554)	(48,115)
Cash Flows from Financing Activities
Principal payments on long-term debt	0	(1,460)
Excess tax benefits on stock awards	394	61
Repurchases of stock	(1,771)	(330)
Proceeds from issuances of stock	1,124	5
Net cash used in financing activities	(253)	(1,724)
Net increase in cash and cash equivalents	33,769	2,316
Cash and cash equivalents:
Beginning	38,316	71,086
Ending	72,085	73,402
Cash payments for:
Interest	3,930	4,390
Income taxes (received) paid	$ (580)	$ 10,283