Consolidated Statement of Cash Flows (unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Statement of Cash Flows [Abstract]
Net loss	$ (11,429)	$ (15,872)
Adjustments to reconcile net (loss) income to cash provided by operating activities:
Depreciation and amortization	15,142	13,502
Stock-based compensation expense	6,225	4,831
Amortization of intangible assets	17,778	19,928
Amortization of deferred costs	1,160	1,335
Provision for bad debts and customer credits	1,058	1,443
Loss on disposal of fixed assets	0	16
Impairment of capitalized software	0	8,377
Change in deferred taxes	(6,298)	(11,537)
Gain on interest rate swap	0	(1,455)
Currency remeasurement (gain) loss	(107)	465
Changes in operating assets and liabilities:
Accounts receivable	(1,186)	330
Prepaid expenses and other current assets	(2,430)	(3,362)
Accounts payable	3,550	(1,612)
Accrued expenses and other liabilities	710	4,307
Deferred revenue	5,960	486
Net cash provided by operating activities	30,133	21,182
Cash flows from investing activities:
Capital expenditures	(5,432)	(6,882)
Restricted cash	(2,443)	0
Payments to Acquire Businesses, Net of Cash Acquired	(600)	0
Capitalized software development costs	(16,575)	(14,676)
Purchase of short-term investments	(36,477)	(31,346)
Maturity of short-term investments	32,596	31,820
Net cash used in investing activities	(28,931)	(21,084)
Cash flows from financing activities:
Proceeds from exercise of stock options and issuance of common stock	1,155	476
Repayments of outstanding financing arrangements	(631)	(300)
Repayments of outstanding principal on long-term debt	(616)	(15,656)
Net cash used in financing activities	(92)	(15,480)
Effect of foreign exchange rate changes on cash and cash equivalents	(265)	(236)
Net increase (decrease) in cash and cash equivalents	845	(15,618)
Cash and cash equivalents at beginning of period	43,798	46,694
Cash and cash equivalents at end of period	$ 44,643	$ 31,076