Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Statement of Cash Flows [Abstract]
Net loss	$ (12,844)	$ (17,843)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	13,163	13,561
Amortization of intangible assets	12,077	11,975
Stock-based compensation expense	5,404	5,864
Other, net	3,199	1,664
Changes in operating assets and liabilities:
Accounts receivable	(5,024)	(7,630)
Prepaid expenses and other assets	2,107	1,168
Accounts payable	(2,703)	502
Accrued expenses and other liabilities	(6,164)	(3,495)
Deferred revenue	3,453	2,184
Net cash provided by operating activities	12,668	7,950
Cash flows from investing activities:
Capitalized software development costs	(13,429)	(11,212)
Capital expenditures	(1,164)	(2,780)
Maturities of investments	11,284	5,550
Acquisition, net of cash acquired	(6,334)	0
Purchase of a cost method investment	0	(1,000)
Net cash used in investing activities	(9,643)	(9,442)
Cash flows from financing activities:
Purchases of treasury stock	(11,489)	0
Payments on long-term debt	(1,148)	(400)
Other, net	(154)	(271)
Net cash used in financing activities	(12,791)	(671)
Effect of foreign exchange rate changes on cash and cash equivalents	258	(475)
Net decrease in cash and cash equivalents	(9,508)	(2,638)
Cash and cash equivalents at beginning of period	47,875	40,682
Cash and cash equivalents at end of period	$ 38,367	$ 38,044