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Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenue:
License and implementation	$ 58,515us-gaap_LicensesRevenue	$ 41,116us-gaap_LicensesRevenue	$ 32,968us-gaap_LicensesRevenue
Sales Revenue, Services, Net	49,225us-gaap_SalesRevenueServicesNet	48,412us-gaap_SalesRevenueServicesNet	35,635us-gaap_SalesRevenueServicesNet
Maintenance and support	54,621us-gaap_MaintenanceRevenue	46,088us-gaap_MaintenanceRevenue	40,135us-gaap_MaintenanceRevenue
Subscription and Circulation Revenue	23,468us-gaap_SubscriptionRevenue	9,221us-gaap_SubscriptionRevenue	9,053us-gaap_SubscriptionRevenue
Total license, service and maintenance revenue	131,208pro_Totallicenseserviceandmaintenancerevenue	98,749pro_Totallicenseserviceandmaintenancerevenue	77,656pro_Totallicenseserviceandmaintenancerevenue
Total revenue	185,829us-gaap_Revenues	144,837us-gaap_Revenues	117,791us-gaap_Revenues
Cost of revenue:
License and implementation	243us-gaap_LicenseCosts	282us-gaap_LicenseCosts	244us-gaap_LicenseCosts
Cost of Services	39,955us-gaap_CostOfServices	32,492us-gaap_CostOfServices	24,329us-gaap_CostOfServices
Cost of Goods Sold, Subscription	7,334us-gaap_CostOfGoodsSoldSubscription	2,122us-gaap_CostOfGoodsSoldSubscription	1,257us-gaap_CostOfGoodsSoldSubscription
Cost of license, service and subscription	47,532pro_Costoflicenseserviceandsubscription	34,896pro_Costoflicenseserviceandsubscription	25,830pro_Costoflicenseserviceandsubscription
Maintenance and support	10,554us-gaap_MaintenanceCosts	8,239us-gaap_MaintenanceCosts	7,955us-gaap_MaintenanceCosts
Cost of Revenue	58,086us-gaap_CostOfRevenue	43,135us-gaap_CostOfRevenue	33,785us-gaap_CostOfRevenue
Gross profit	127,743us-gaap_GrossProfit	101,702us-gaap_GrossProfit	84,006us-gaap_GrossProfit
Selling and Marketing Expense	62,156us-gaap_SellingAndMarketingExpense	39,478us-gaap_SellingAndMarketingExpense	29,987us-gaap_SellingAndMarketingExpense
General and Administrative Expense	37,761us-gaap_GeneralAndAdministrativeExpense	24,046us-gaap_GeneralAndAdministrativeExpense	18,228us-gaap_GeneralAndAdministrativeExpense
Operating Expenses
Research and development	43,174us-gaap_ResearchAndDevelopmentExpenseSoftwareExcludingAcquiredInProcessCost	32,467us-gaap_ResearchAndDevelopmentExpenseSoftwareExcludingAcquiredInProcessCost	27,611us-gaap_ResearchAndDevelopmentExpenseSoftwareExcludingAcquiredInProcessCost
Business Combination, Acquisition Related Costs	3,019us-gaap_BusinessCombinationAcquisitionRelatedCosts	2,173us-gaap_BusinessCombinationAcquisitionRelatedCosts	0us-gaap_BusinessCombinationAcquisitionRelatedCosts
Tangible Asset Impairment Charges	4,040us-gaap_TangibleAssetImpairmentCharges	0us-gaap_TangibleAssetImpairmentCharges	0us-gaap_TangibleAssetImpairmentCharges
Income from operations	(22,407)us-gaap_OperatingIncomeLoss	3,538us-gaap_OperatingIncomeLoss	8,180us-gaap_OperatingIncomeLoss
Other income:
Other Nonoperating Income (Expense)	(2,651)us-gaap_OtherNonoperatingIncomeExpense	(265)us-gaap_OtherNonoperatingIncomeExpense	(163)us-gaap_OtherNonoperatingIncomeExpense
Income before income tax provision	(25,058)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	3,273us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	8,017us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Income tax provision	12,493us-gaap_IncomeTaxExpenseBenefit	(173)us-gaap_IncomeTaxExpenseBenefit	3,051us-gaap_IncomeTaxExpenseBenefit
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(37,551)us-gaap_ProfitLoss	3,446us-gaap_ProfitLoss	4,966us-gaap_ProfitLoss
Net Income (Loss) Attributable to Noncontrolling Interest	(907)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest	0us-gaap_NetIncomeLossAttributableToNoncontrollingInterest	0us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Net Income (Loss) Attributable to Parent	(36,644)us-gaap_NetIncomeLoss	3,446us-gaap_NetIncomeLoss	4,966us-gaap_NetIncomeLoss
Net earnings per share:
Basic	$ (1.27)us-gaap_EarningsPerShareBasic	$ 0.12us-gaap_EarningsPerShareBasic	$ 0.18us-gaap_EarningsPerShareBasic
Diluted	$ (1.27)us-gaap_EarningsPerShareDiluted	$ 0.11us-gaap_EarningsPerShareDiluted	$ 0.17us-gaap_EarningsPerShareDiluted
Weighted average number of shares:
Basic	28,915,496us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	28,004,019us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	27,365,731us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Diluted	28,915,496us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	30,114,373us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	28,419,956us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(2,249)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	0us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	0us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Other Comprehensive Income (Loss), Net of Tax	(2,249)us-gaap_OtherComprehensiveIncomeLossNetOfTax	0us-gaap_OtherComprehensiveIncomeLossNetOfTax	0us-gaap_OtherComprehensiveIncomeLossNetOfTax
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	(39,800)us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	3,446us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	4,966us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
Comprehensive (Income) Loss, Net of Tax, Attributable to Noncontrolling Interest	(922)us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	0us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	0us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest
Comprehensive income	$ (38,878)us-gaap_ComprehensiveIncomeNetOfTax	$ 3,446us-gaap_ComprehensiveIncomeNetOfTax	$ 4,966us-gaap_ComprehensiveIncomeNetOfTax

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