Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended												12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Components of income (loss) before income taxes [Abstract]
United States													$ (32,231)	$ (7,976)	$ (31,282)
Foreign													7,502	6,110	6,120
Loss before income taxes	(16,571)	(2,142)	(3,758)	(2,258)	(208)	(1,255)	341	(744)	(3,696)	(3,459)	(14,903)	(3,104)	(24,729)	(1,866)	(25,162)
Current [Abstract]
Federal													0	(4,191)	(111)
State													482	(287)	320
Foreign													28	35	201
Total current													510	(4,443)	410
Deferred [Abstract]
Federal													925	5,636	(2)
State													279	425	0
Foreign													2,377	2,047	(14,054)
Total deferred													3,581	8,108	(14,056)
Total provision													4,091	3,665	(13,646)
Statutory income tax rate (in hundredths)													35.00%
Reconciliation of actual income taxes and expected income taxes [Abstract]
Expected tax benefit													(8,655)	(653)	(8,807)
Total increase (decrease) in income taxes resulting from [Abstract]
Change in valuation allowance allocated to income tax expense													13,987	10,641	(9,673)
Research and experimentation credit													0	0	(78)
Share-based Compensation													38	24	83
Acquisition costs													309	(684)	3,386
State and local income taxes, net of federal income tax benefit													(672)	(212)	435
Foreign income tax rate differential													(723)	(463)	(212)
Change in unrecognized tax benefits													167	(4,669)	241
Other													(360)	(319)	979
Actual income tax expense (benefit)													4,091	3,665	(13,646)
Components of Deferred Tax Assets [Abstract]
Accrued compensation	162				611								162	611
Bad debt	3,844				854								3,844	854
Depreciation	2,703				2,775								2,703	2,775
Research and experimentation credit carryforwards	6,951				7,324								6,951	7,324
Other credit carryforwards	1,566				1,476								1,566	1,476
Domestic loss carryforwards	115,421				113,459								115,421	113,459
Foreign loss carryforwards	8,007				9,652								8,007	9,652
Nonqualified stock options	5,374				3,450								5,374	3,450
Other	5,576				4,967								5,576	4,967
Total gross deferred tax assets	149,604				144,568								149,604	144,568
Less: asset valuation allowance	(121,117)				(105,743)								(121,117)	(105,743)
Net deferred tax asset	28,487				38,825								28,487	38,825
Deferred tax liabilities:
Software development costs and intangible assets	(7,572)				(8,439)								(7,572)	(8,439)
Intangibles-customer contracts & tradenames	(8,680)				(14,223)								(8,680)	(14,223)
Other	(5,105)				(5,452)								(5,105)	(5,452)
Total gross deferred liabilities	(21,357)				(28,114)								(21,357)	(28,114)
Net deferred tax asset	7,130				10,711								7,130	10,711
Included on balance sheet [Abstract]
Current assets: deferred income taxes	3,135				3,393								3,135	3,393
Non-current asset: deferred income taxes	7,041				9,209								7,041	9,209
Non-current liabilities: deferred income taxes	(3,046)				(1,891)								(3,046)	(1,891)
Net deferred tax asset	7,130				10,711								7,130	10,711
Reversal in valuation allowance related to deferred tax assets															14,054
Estimated unrealizable deferred tax assets	24,946												24,946
Net increase in the valuation allowance													15,374	4,358	31,830
Potential tax benefits associated with stock based compensation	1,638				1,514								1,638	1,514
Unrecognized tax benefits, interest on income tax penalties accrued	162				142								162	142
Unrecognized tax benefits, income tax penalties accrued	102				54								102	54
Total interest included in tax expense													19	(111)	40
Total penalties included in tax expense													48	(3)	1
Reconciliation of the total amounts of unrecognized tax benefits [Abstract]
Balance at January 1				1,862				6,703				6,506	1,862	6,703	6,506
Gross increases - tax positions in current year													55	0	19
Gross increases - tax positions in prior year													192	0	178
Gross decreases - tax positions in prior year													0	(12)	0
Decreases due to statute expirations													0	(4,829)	0
Balance at December 31	2,109				1,862				6,703				2,109	1,862	6,703
Unrecognized tax benefits affect the effective tax rate	1,948				1,785								1,948	1,785
Period for which no expected change in unrecognized tax benefit													12 months
Federal [Member]
Included on balance sheet [Abstract]
Net operating loss carryforwards	292,370												292,370
Federal [Member] | Capital Loss [Member]
Included on balance sheet [Abstract]
Capital loss	3,605												3,605
Federal [Member] | Research Credit [Member]
Included on balance sheet [Abstract]
Tax credit carryforward, amount	4,911												4,911
Federal [Member] | Alternative Minimum Tax Credit [Member]
Included on balance sheet [Abstract]
Tax credit carryforward, amount	977												977
State [Member]
Included on balance sheet [Abstract]
Net operating loss carryforwards	172,632												172,632
Capital loss	3,605												3,605
Tax credit carryforward, amount	408												408
Foreign [Member]
Included on balance sheet [Abstract]
Net operating loss carryforwards	27,587												27,587
Capital loss	5,657												5,657
Tax credit carryforward, amount	297												297
Foreign [Member] | Research Credit [Member]
Included on balance sheet [Abstract]
Tax credit carryforward, amount	2,008												2,008
Provincial [Member]
Included on balance sheet [Abstract]
Net operating loss carryforwards	20,694												20,694
Capital loss	5,657												5,657
Provincial [Member] | Research Credit [Member]
Included on balance sheet [Abstract]
Tax credit carryforward, amount	$ 291												$ 291