Share-Based Compensation to Employees (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended			9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		0 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Long Term Incentive Plan [Member]	Jun. 30, 2013 Cost of Sercives [Member]	Jun. 30, 2012 Cost of Sercives [Member]	Jun. 30, 2013 Cost of Sercives [Member]	Jun. 30, 2012 Cost of Sercives [Member]	Jun. 30, 2013 General and Administrative [Member]	Jun. 30, 2012 General and Administrative [Member]	Jun. 30, 2013 General and Administrative [Member]	Jun. 30, 2012 General and Administrative [Member]	Jun. 30, 2013 Sales and Marketing [Member]	Jun. 30, 2012 Sales and Marketing [Member]	Jun. 30, 2013 Sales and Marketing [Member]	Jun. 30, 2012 Sales and Marketing [Member]	Jun. 30, 2013 Technology and Development [Member]	Jun. 30, 2012 Technology and Development [Member]	Jun. 30, 2013 Technology and Development [Member]	Jun. 30, 2012 Technology and Development [Member]	Jun. 12, 2013 Restricted Stock Units [Member] 2008 Plan [Member]	Jun. 30, 2013 Restricted Stock Units [Member] 2008 Plan [Member]	Jun. 30, 2013 Restricted Stock Units [Member] Long Term Incentive Plan [Member]	Jun. 30, 2013 Restricted Stock Units [Member] Long Term Incentive Plan [Member]	Jun. 30, 2013 Stock Options [Member] 2008 Plan [Member]	Jun. 30, 2013 Stock Options [Member] Long Term Incentive Plan [Member]	Jun. 30, 2013 Stock Options [Member] Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period																							3 years		3 years	4 years		3 years
RSUs vested early due to IPO																						623
Period over which compensation becomes payable																						1 year
Allocated share-based compensation expense	$ 10,089	$ 723	$ 11,228	$ 2,078		$ 1,900	$ 62	$ 1,987	$ 151	$ 3,650	$ 468	$ 4,372	$ 1,207	$ 2,164	$ 93	$ 2,329	$ 215	$ 2,375	$ 100	$ 2,540	$ 505	$ 9,351
Number of shares authorized					6,000
Maximum expiration period																										10 years		10 years
Stock options outstanding																										2,408
Stock units granted																								73
Stock options granted																											1,021
Weighted-average fair value per unit																								$ 15.00
Weighted-average fair value per option																											$ 6.97
Weighted-average exercise price					$ 15.00