CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in-Capital	(Accumulated Deficit) Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Balance at Sep. 30, 2020	$ 960,071	$ 369	$ 974,307	$ (18,316)	$ 3,711
Balance (in shares) at Sep. 30, 2020		36,842
Net income (loss)	20,941			20,941
Other comprehensive income (loss)	14,140				14,140
Issuance of common stock	3,663	$ 13	3,650
Issuance of common stock, (in shares)		1,276
Stock withheld to cover tax withholdings requirements upon stock vesting	(30,258)	$ (4)	(30,254)
Stock withheld to cover tax withholdings requirements upon stock vesting, (in shares)		(433)
Stock-based compensation	27,163		27,163
Balance at Dec. 31, 2020	995,720	$ 378	974,866	2,625	17,851
Balance (in shares) at Dec. 31, 2020		37,685
Balance at Sep. 30, 2021	1,031,945	$ 381	1,002,353	27,577	1,634
Balance (in shares) at Sep. 30, 2021		38,025
Net income (loss)	19,044			19,044
Other comprehensive income (loss)	(5,351)				(5,351)
Issuance of common stock	32,139	$ 12	32,127
Issuance of common stock, (in shares)		1,281
Stock withheld to cover tax withholdings requirements upon stock vesting	(46,288)	$ (1)	(46,287)
Stock withheld to cover tax withholdings requirements upon stock vesting, (in shares)		(144)
Stock-based compensation	18,012		18,012
Balance at Dec. 31, 2021	$ 1,049,501	$ 392	$ 1,006,205	$ 46,621	$ (3,717)
Balance (in shares) at Dec. 31, 2021		39,162