Temporary Equity and Noncontrolling Interest (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Jun. 30, 2016
Increase (Decrease) in Temporary Equity [Roll Forward]
Redeemable noncontrolling interest, beginning balance	$ 4,040
Temporary equity, beginning balance	15,736
Redeemable noncontrolling interest, ending balance	0	$ 4,040
Temporary equity, ending balance	0	15,736
Common Class A Non-Voting, Subject to Possible Redemption
Increase (Decrease) in Temporary Equity [Roll Forward]
Common stock, subject to possible redemption, beginning balance	11,696	0
Issuance of common stock, subject to possible redemption		11,696
Repurchase of redeemable common stock	(11,696)
Sale of additional shares to parent	0	0
Net loss attributable to noncontrolling interest	0	0
Foreign currency translation adjustment attributable to noncontrolling interest	0	0
Amounts reclassified from accumulated other comprehensive loss	0	0
Disposition of Grupo Finmart	0
Common stock, subject to possible redemption, ending balance	0	11,696
Redeemable Noncontrolling Interest
Increase (Decrease) in Temporary Equity [Roll Forward]
Redeemable noncontrolling interest, beginning balance	4,040	26,612
Issuance of common stock, subject to possible redemption		0
Repurchase of redeemable common stock	0
Sale of additional shares to parent	0	(12,225)
Net loss attributable to noncontrolling interest	(6,661)	(5,035)
Foreign currency translation adjustment attributable to noncontrolling interest	(394)	(5,341)
Amounts reclassified from accumulated other comprehensive loss	1	29
Disposition of Grupo Finmart	3,014
Redeemable noncontrolling interest, ending balance	0	4,040
Total Temporary Equity
Increase (Decrease) in Temporary Equity [Roll Forward]
Temporary equity, beginning balance	15,736	26,612
Issuance of common stock, subject to possible redemption		11,696
Repurchase of redeemable common stock	(11,696)
Sale of additional shares to parent	0	(12,225)
Net loss attributable to noncontrolling interest	(6,661)	(5,035)
Foreign currency translation adjustment attributable to noncontrolling interest	(394)	(5,341)
Amounts reclassified from accumulated other comprehensive loss	1	29
Disposition of Grupo Finmart	3,014
Temporary equity, ending balance	0	15,736
Noncontrolling Interest
Increase (Decrease) in Temporary Equity [Roll Forward]
Redeemable noncontrolling interest, beginning balance	0
Repurchase of redeemable common stock	0
Sale of additional shares to parent	246
Net loss attributable to noncontrolling interest	(1,025)
Foreign currency translation adjustment attributable to noncontrolling interest	1
Amounts reclassified from accumulated other comprehensive loss	0
Disposition of Grupo Finmart	0
Redeemable noncontrolling interest, ending balance	$ (778)	$ 0
Acquisition interest			40.00%