Related Party Transactions - Additional Information (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Accounts receivable, related parties	$ 1.6	$ 1.7
M/I Homes Inc [Member]
Related Party Transaction [Line Items]
Accounts receivable, related parties	$ 1.2	$ 1.3

Amount of receivables arising from transactions with related parties due within one year or the normal operating cycle, if longer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Name:	us-gaap_AccountsReceivableRelatedPartiesCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant