Disposal of Businesses - Additional Information (Details) - USD ($)		3 Months Ended		9 Months Ended		12 Months Ended
	Feb. 17, 2015	Sep. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	May 31, 2018
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Provision for loss on note receivable				$ 0	$ 23,008,000
Maximum [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Interest rate				5.45%
Minimum [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Interest rate				4.67%
Brazil Business [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Worthless stock deduction on federal tax payments						$ 4,300,000
Brazil Business [Member] | Maximum [Member] | Factoring Arrangement [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Guarantee obligation amount until December 31, 2019				$ 7,000,000
Brazil Business [Member] | Level 3 [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Liability related to guaranty				$ 0
Lawn and Garden Business [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Interest rate	6.00%
Promissory note receivable	$ 20,000,000
Maturity date of promissory note receivable	2022-08
Provision for loss on note receivable		$ 23,000,000
Discontinued operations pre-tax charge			$ 1,225,000
Escrow deposit released							$ 7,400,000
Escrow deposit	$ 8,600,000
Escrow deposit due to be settled date	2016-08