Unaudited Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid‑in Capital	Retained Deficit	Retained Deficit Cumulative Effect, Period of Adoption, Adjustment [Member]	Accumulated Other Comprehensive Loss	Non‑controlling Interest
Common stock issued at the beginning of the period (shares) at Sep. 30, 2019		116,008,000
Stockholders' equity, balance at the beginning of the period at Sep. 30, 2019	$ 365,822	$ 1,154	$ (2,837)	$ 552,422	$ (174,976)	$ (2,023)	$ (13,004)	$ 3,063
Treasury stock, balance at the beginning of the period (in shares) at Sep. 30, 2019			1,664,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity based compensation expense	3,680			3,680
Issuance of common stock (in shares)		1,645,000	1,000
Issuance of common stock, cost		$ 16		4,030
Proceeds from issuance of common stock	4,046
Dividends paid to non-controlling interest	(1,250)							(1,250)
Net income	53,506				53,145			361
Other comprehensive income (loss)	8,244
Common stock issued at the end of the period (shares) at Dec. 31, 2019		117,653,000
Stockholders' equity, balance at the end of the period at Dec. 31, 2019	$ 415,130	$ 1,170	$ (2,837)	543,237	(123,854)		(4,760)	2,174
Treasury stock, balance at the end of the period (in shares) at Dec. 31, 2019			2,083,000
Common stock issued at the beginning of the period (shares) at Sep. 30, 2020	119,486,000	119,486,000
Stockholders' equity, balance at the beginning of the period at Sep. 30, 2020	$ 482,063	$ 1,189	$ (2,837)	564,928	(62,664)		(20,472)	1,919
Treasury stock, balance at the beginning of the period (in shares) at Sep. 30, 2020	2,195,000		2,195,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity based compensation expense	$ 3,019			3,019
Issuance of common stock (in shares)		1,264,000	419,000
Issuance of common stock, cost		$ 13		14,250
Proceeds from issuance of common stock	14,263
Dividends paid to non-controlling interest	(250)							(250)
Net income	6,477				6,433
Other comprehensive income (loss)	$ (3,611)
Common stock issued at the end of the period (shares) at Dec. 31, 2020	120,750,000	120,750,000
Stockholders' equity, balance at the end of the period at Dec. 31, 2020	$ 501,961	$ 1,202	$ (2,837)	582,197	$ (56,231)		$ (24,083)	$ 1,713
Treasury stock, balance at the end of the period (in shares) at Dec. 31, 2020	2,196,000		2,196,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adjustments to Additional Paid in Capital, Other	$ (16,895)			$ (16,895)