Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Operating activities
Net income	$ 12,704,000	$ 17,262,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	14,160,000	14,624,000
Stock-based compensation	4,262,000	3,972,000
Equity investment income	(105,000)	(653,000)
Deferred income taxes	456,000	(1,505,000)
Loss on disposals of long-lived assets	1,558,000	5,870,000
Impairment of goodwill	0	4,735,000
Other	312,000	10,000
Changes in operating assets and liabilities:
Accounts receivable, net of allowance for bad debt	560,000	2,039,000
Prepaid expenses and other assets	(1,445,000)	677,000
Income tax receivable	(757,000)	(1,182,000)
Accounts payable	(1,812,000)	(617,000)
Accrued liabilities	(1,430,000)	(1,492,000)
Income taxes payable	(559,000)	(682,000)
Deferred revenue	1,355,000	(370,000)
Net cash provided by operating activities	29,259,000	42,688,000
Investing activities
Capital expenditures	(6,535,000)	(9,670,000)
Capitalized program development costs and other assets	(3,005,000)	(1,464,000)
Proceeds from sale of real property	1,493,000	0
Equity investment	0	(950,000)
Dividend received from equity investment	0	2,957,000
Net cash used in investing activities	(8,047,000)	(9,127,000)
Financing activities
Cash paid for repurchase of common stock	(1,404,000)	(630,000)
Cash received from issuance of common stock	100,000	28,000
Excess tax benefit from stock-based compensation	0	(1,002,000)
Net cash used in financing activities	(1,304,000)	(1,604,000)
Net increase in cash and cash equivalents	19,908,000	31,957,000
Cash and cash equivalents at beginning of period	146,351,000	105,734,000
Cash and cash equivalents at end of period	166,259,000	137,691,000
Supplemental disclosure of cash flow information
Income taxes paid	$ 10,528,000	$ 14,894,000