Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Operating activities
Net income	$ 8,338	$ 16,936
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	9,470	9,714
Stock-based compensation	2,696	2,681
Equity investment income	(61)	(671)
Deferred income taxes	2,073	2,833
Loss on disposals of long-lived assets	1,168	725
Other	28	36
Changes in operating assets and liabilities:
Accounts receivable, net of allowance for bad debt	748	1,453
Prepaid expenses and other assets	(1,803)	773
Income tax receivable	(3,120)	(2,814)
Accounts payable	(442)	690
Accrued liabilities	(2,428)	(238)
Income taxes payable	(559)	0
Deferred revenue	163	(3,331)
Net cash provided by operating activities	16,271	28,787
Investing activities
Capital expenditures	(3,781)	(6,904)
Capitalized program development costs and other assets	(1,902)	(836)
Proceeds from sale of real property	1,493	0
Equity investment	0	(950)
Net cash used in investing activities	(4,190)	(8,690)
Financing activities
Cash paid for repurchase of common stock	(1,402)	(630)
Cash received from issuance of common stock	98	7
Excess tax benefit from stock-based compensation	0	(1,116)
Net cash used in financing activities	(1,304)	(1,739)
Net increase in cash and cash equivalents	10,777	18,358
Cash and cash equivalents at beginning of period	146,351	105,734
Cash and cash equivalents at end of period	157,128	124,092
Supplemental disclosure of cash flow information
Income taxes paid	$ 7,980	$ 12,218