Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands		Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Noncontrolling Interest
Beginning balance (shares) at Sep. 30, 2016	[1]		54,099
Beginning balance at Sep. 30, 2016	[1]	$ 591,142	$ 541	$ 318,723	$ 316,476	$ (43,820)	$ (778)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation		5,831		5,831
Release of restricted stock (shares)			299
Release of restricted stock		3	$ 3
Taxes paid related to net share settlement of equity awards		(767)		(767)
Reclassification of 2019 Convertible Notes Warrants to liabilities		(523)		(523)
Foreign currency translation gain (loss)		5,642				5,663	(21)
Foreign currency translation reclassification upon disposition of Grupo Finmart		25,268		25,268
Net income (loss)		29,759			31,409		(1,650)
Ending balance (shares) at Sep. 30, 2017			54,398
Ending balance at Sep. 30, 2017		656,355	$ 544	348,532	347,885	(38,157)	(2,449)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation		10,711		10,711
Release of restricted stock (shares)			187
Release of restricted stock		2	$ 2
Taxes paid related to net share settlement of equity awards		(311)		(311)
Reclassification of stranded tax effects resulting from the Tax Cuts and Jobs Act					1,455	(1,455)
Foreign currency translation gain (loss)		(2,638)				(2,744)	106
Equity classified conversion feature of 2024 Convertible Notes, net of tax		38,995		38,995
Net income (loss)		36,294			37,282		(988)
Ending balance (shares) at Sep. 30, 2018			54,585
Ending balance at Sep. 30, 2018		739,408	$ 546	397,927	386,622	(42,356)	(3,331)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation		9,794		9,794
Transfer of subsidiary shares to noncontrolling interest				3,195			(3,195)
Release of restricted stock (shares)			950
Release of restricted stock		10	$ 10
Taxes paid related to net share settlement of equity awards		(3,288)		(3,288)
Foreign currency translation gain (loss)		(10,042)				(10,042)
Deconsolidation of subsidiary		7,756					7,756
Net income (loss)		1,311			2,541		(1,230)
Ending balance (shares) at Sep. 30, 2019			55,535
Ending balance at Sep. 30, 2019		$ 744,949	$ 556	$ 407,628	$ 389,163	$ (52,398)	$ 0

[1] See Note 1 of Notes to Consolidated Financial Statements for discussion of opening balance impact as a result of corrections to prior period financial statements.