Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating activities
Net income	$ 10,340	$ 8,793
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	4,889	4,589
Stock-based compensation	1,502	1,394
Investment (income)/loss	(600)	38
Deferred income taxes	1,975	632
Other	279	25
Changes in operating assets and liabilities:
Accounts receivable, net of allowance for bad debt	(643)	(3,111)
Prepaid expenses and other assets	4,031	(800)
Income tax receivable	(981)	82
Accounts payable	907	(4,778)
Accrued liabilities	2,182	346
Deferred revenue	(3,829)	(64)
Net cash provided by operating activities	20,052	7,146
Investing activities
Capital expenditures	(3,139)	(5,288)
Equity investment	(950)	0
Capitalized program development costs and other assets	(82)	(138)
Net cash used in investing activities	(4,171)	(5,426)
Financing activities
Cash paid for repurchase of common stock	(630)	(4,668)
Excess (tax)/tax benefit from stock-based compensation	(1,000)	(349)
Net cash used in financing activities	(1,630)	(5,017)
Net increase/(decrease) in cash and cash equivalents	14,251	(3,297)
Cash and cash equivalents at beginning of period	105,734	115,634
Cash and cash equivalents at end of period	119,985	112,337
Supplemental disclosure of cash flow information
Income taxes paid	$ 6,956	$ 5,285