Financing Activity - Additional Information (Detail) - USD ($)		3 Months Ended		12 Months Ended
	Jan. 08, 2014	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Debt Instrument [Line Items]
Term Loan Borrowing		$ 400,000,000
Long-term Debt		398,160,000		$ 398,040,000
Amount outstanding		115,000,000		$ 65,000,000
Repayments of Long-term Debt			$ (120,000,000)
Maximum Unsecured Borrowing Amount Under Unencumbered Debt Yield Covenant		209,600,000
Two Thousand Fourteen Term Loans [Member]
Debt Instrument [Line Items]
Sales Per Square Foot	$ 500
Two Thousand Fourteen Term Loans [Member] | Minimum [Member]
Debt Instrument [Line Items]
Capitalization Rate	6.50%
Two Thousand Fourteen Term Loans [Member] | Maximum [Member]
Debt Instrument [Line Items]
Capitalization Rate	7.50%
2013 Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest expense excluding non-cash amortization of finance costs		690,100	380,900
Non-cash amortization of deferred financing fees		198,700	358,000
Outstanding commitments				0.25%
Letters of Credit Outstanding, Amount		15,300,000
Term Loans [Member]
Debt Instrument [Line Items]
Interest expense excluding non-cash amortization of finance costs		2,991,900	1,257,200
Non-cash amortization of deferred financing fees		$ 119,900	$ 76,400