CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net income	$ 17,079	$ 17,273
Adjustments to reconcile net income to cash provided (used) by operations:
Depreciation and amortization	12,176	3,713
Share-based compensation expense	6,480	4,258
Excess tax benefit from exercises of share-based arrangements	(1,051)	(3,558)
Changes in operating assets and liabilities, exclusive of effects of acquired companies:
Accounts receivable	35,750	8,320
Income taxes	10,424	8,394
Prepaid expenses and other current assets	2,074	763
Accounts payable	(473)	(328)
Accrued liabilities	(11,738)	(16,423)
Deferred revenue	(30,451)	(24,507)
Net cash provided (used) by operating activities	40,270	(2,095)
Cash flows from investing activities:
Purchase of marketable security investments	(6,410)
Proceeds from marketable security investments	3,025
Cost of acquisitions	(2,000)	(325)
Additions to property and equipment	(16,722)	(1,909)
Investment in Record Holdings Pty Limited		(15,000)
Increase in other	(49)
Net cash used by investing activities	(22,156)	(17,234)
Cash flows from financing activities:
Increase in net borrowings on revolving line of credit	74,000
Purchase of treasury shares	(93,930)
Proceeds from exercise of stock options	1,781	3,425
Contributions from employee stock purchase plan	1,238	900
Excess tax benefit from exercises of share-based arrangements	1,051	3,558
Net cash (used) provided by financing activities	(15,860)	7,883
Net increase (decrease) in cash and cash equivalents	2,254	(11,446)
Cash and cash equivalents at beginning of period	33,087	206,167
Cash and cash equivalents at end of period	$ 35,341	$ 194,721