CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Total Meta Stockholders' Equity	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss), Net of Tax	Treasury Stock	Non-controlling Interest
Balance at the beginning of the period at Sep. 30, 2016	$ 334,975	$ 334,975	$ 255	$ 184,610	$ 127,190	$ 22,920	$ 0	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared on common stock	(4,839)	(4,839)			(4,839)
Issuance of common shares due to exercise of stock options	650	650		650
Issuance of common shares due to restricted stock	12	12	12
Issuance of common shares due to ESOP	1,174	1,174		1,174
Issuance of common shares due to acquisition	37,296	37,296	21	37,275
Contingent consideration equity earnout due to acquisition	24,142	24,142		24,142
Shares repurchased	(470)	(470)		(204)			(266)
Stock compensation	10,393	10,393		10,393
Total other comprehensive income	(13,754)	(13,754)				(13,754)
Net income	44,917	44,917			44,917
Balance at the end of the period at Sep. 30, 2017	434,496	434,496	288	258,144	167,164	9,166	(266)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared on common stock	(5,736)	(5,736)			(5,736)
Issuance of common shares due to exercise of stock options	148	148	1	147
Issuance of common shares due to restricted stock	4	4	4
Issuance of common shares due to ESOP	1,606	1,606	1	1,605
Issuance of common shares due to acquisition	295,766	295,766	99	295,667
Shares repurchased	(2,598)	(2,598)		(875)			(1,723)
Stock compensation	11,123	11,123		11,123
Total other comprehensive income	(42,277)	(42,277)				(42,277)
Net income	52,293	51,620			51,620			673
Non-controlling interests due to acquisition	3,167							3,167
Net investment by (distribution to) noncontrolling interests	(266)							(266)
Balance at the end of the period at Sep. 30, 2018	747,726	744,152	393	565,811	213,048	(33,111)	(1,989)	3,574
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared on common stock	(7,760)	(7,760)			(7,760)
Issuance of common shares due to exercise of stock options	44	44		44
Issuance of common shares due to restricted stock	3	3	3
Issuance of common shares due to ESOP	2,011	2,011		2,011
Shares repurchased	(49,912)	(49,912)	(18)	18	(46,500)		(3,412)
Retirement of treasury stock					(4,956)		4,956
Stock compensation	12,942	12,942		12,942
Total other comprehensive income	39,925	39,925				39,925
Net income	101,316	97,004			97,004			4,312
Net investment by (distribution to) noncontrolling interests	(3,839)							(3,839)
Balance at the end of the period at Sep. 30, 2019	$ 843,958	$ 839,911	$ 378	$ 580,826	$ 252,813	$ 6,339	$ (445)	$ 4,047