Description of Business - Additional Information (Detail)	Mar. 31, 2020 Property State ft²
Description Of Business [Line Items]
Number of properties in portfolio	947
Number of states in which our properties are located | State	35
Space used for office | ft²	8,900
Third Party Landlords [Member]
Description Of Business [Line Items]
Number of properties leased	62
Owned Properties [Member]
Description Of Business [Line Items]
Number of properties	885