Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating
Net income	$ 38,129	$ 38,523	$ 55,653
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation and amortization	11,392	11,817	15,894
Deferred income taxes	3,061	8	(2,295)
(Gain) loss on sale of property and equipment	(110)	(60)	458
Loss (gain) on sale of Americas data assets		1,081	(28,791)
Gain on settlement of Tinet escrow	(1,290)
Loss on sale of discontinued operations			4,837
Non-cash share-based compensation	5,222	4,269	6,163
Gain on intercompany foreign exchange transactions			56
Provision for uncollectible accounts	197	1,925	900
Excess tax benefit associated with share-based payments	(1,852)	(1,090)	(262)
Changes in assets and liabilities:
Receivables	(7,020)	(12,491)	4,281
Other current assets	(6,095)	(247)	180
Other noncurrent assets	(68)	2,614	199
Accounts payable	146	(175)	(3,830)
Accrued liabilities	6,163	(5,716)	3,922
Net cash provided by operating activities	47,875	40,458	57,365
Investing
Purchase of property and equipment	(26,439)	(10,090)	(12,470)
Proceeds from sale of property and equipment	188	72	28
Sale of other investments			534
Proceeds from sale of discontinued operations, net of transaction costs			42,587
Proceeds from sale of Americas data assets, net of transaction costs			4,203
(Increase) decrease in restricted cash		(220)	837
Net cash (used for) provided by investing activities	(26,251)	(10,238)	35,719
Financing
Proceeds from the exercise of stock options	2,211	12,476	468
Restricted shares withheld to cover employee taxes paid	(1,187)	(1,113)	(808)
Dividends paid	(20,187)	(14,940)	(45,922)
Payments made for repurchase of common stock			(1,565)
Excess tax benefit associated with share-based payments	1,852	1,090	262
Net cash used for financing activities	(17,311)	(2,487)	(47,565)
Effect of exchange rate changes on cash			6
Net increase in cash and cash equivalents	4,313	27,733	45,525
Cash and cash equivalents — Beginning	104,737	77,004	31,479
Cash and cash equivalents — Ending	109,050	104,737	77,004
Supplemental disclosure of cash flow information:
Cash paid for taxes	24,477	25,759	12,695
Supplemental disclosure of noncash flow items:
Investing activity — Accrued purchases of property and equipment	$ 19	$ 1,348	$ 1,742