Equity and Comprehensive Income Equity and Comprehensive Income (Loss) Table (Details) (USD $)	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Components of Stockholders Equity [Line Items]
Equity, attributable to Concur, Period start	$ 740,492,000	$ 698,655,000
Equity, noncontrolling interest, Period start	581,000	1,176,000
Equity, Period start	741,073,000	699,831,000
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]
Net income (loss), attributable to Concur	(12,032,000)	(868,000)
Net income (loss), noncontrolling interest	(286,000)	(79,000)
Net income (loss)	(12,318,000)	(947,000)
Foreign currency translation adjustments, attributable to Concur	793,000	(1,714,000)
Foreign currency translation adjustments, noncontrolling interest	(39,000)	(6,000)
Foreign currency translation adjustments	754,000	(1,720,000)
Unrealized gain (loss) on available-for-sale investments, net of tax, attributable to Concur	(16,000)	(8,000)
Unrealized gain (loss) on available-for-sale investments, net of tax, noncontrolling interest	0	0
Unrealized gain (loss) on available-for-sale investments, net of tax	(16,000)	(8,000)
Comprehensive income (loss) attributable to Concur	(11,255,000)	(2,590,000)
Comprehensive income (loss), noncontrolling interest	(325,000)	(85,000)
Comprehensive income (loss)	(11,580,000)	(2,675,000)
Share based transactions and compensation expense	19,699,000	13,352,000
Repurchase of common stock	(201,000)	(473,000)
Equity, attributable to Concur, Period end	748,735,000	708,944,000
Equity, noncontrolling interest, Period end	256,000	1,091,000
Equity, Period end	748,991,000	710,035,000
Attributable to Concur
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]
Share based transactions and compensation expense	19,699,000	13,352,000
Repurchase of common stock	(201,000)	(473,000)
Noncontrolling interest
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]
Share based transactions and compensation expense	0	0
Repurchase of common stock	$ 0	$ 0