Aggregate Allocation of Purchase Price (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Transaction to Real Estate Investments [Line Items]
Total purchase price	$ 190,743
Land
Transaction to Real Estate Investments [Line Items]
Total purchase price	31,478
Building
Transaction to Real Estate Investments [Line Items]
Total purchase price	119,955
Site Improvements
Transaction to Real Estate Investments [Line Items]
Total purchase price	15,485
Tenant Improvements [Member]
Transaction to Real Estate Investments [Line Items]
Total purchase price	9,601
Real Estate Investment
Transaction to Real Estate Investments [Line Items]
Total purchase price	176,519
Leaseholds and Leasehold Improvements [Member]
Transaction to Real Estate Investments [Line Items]
Total purchase price	30,061
Above Market Lease [Member]
Transaction to Real Estate Investments [Line Items]
Total purchase price	5,463
Below Market Lease Liabilities [Member]
Transaction to Real Estate Investments [Line Items]
Total purchase price	21,300
TENNESSEE
Transaction to Real Estate Investments [Line Items]
Total purchase price	19,000
TENNESSEE | Land
Transaction to Real Estate Investments [Line Items]
Total purchase price	3,503
TENNESSEE | Building
Transaction to Real Estate Investments [Line Items]
Total purchase price	11,960
TENNESSEE | Site Improvements
Transaction to Real Estate Investments [Line Items]
Total purchase price	1,349
TENNESSEE | Real Estate Investment
Transaction to Real Estate Investments [Line Items]
Total purchase price	16,812
TENNESSEE | Leaseholds and Leasehold Improvements [Member]
Transaction to Real Estate Investments [Line Items]
Total purchase price	4,288
TENNESSEE | Below Market Lease Liabilities [Member]
Transaction to Real Estate Investments [Line Items]
Total purchase price	2,100
VIRGINIA
Transaction to Real Estate Investments [Line Items]
Total purchase price	17,743
VIRGINIA | Land
Transaction to Real Estate Investments [Line Items]
Total purchase price	6,394
VIRGINIA | Building
Transaction to Real Estate Investments [Line Items]
Total purchase price	10,862
VIRGINIA | Site Improvements
Transaction to Real Estate Investments [Line Items]
Total purchase price	1,184
VIRGINIA | Real Estate Investment
Transaction to Real Estate Investments [Line Items]
Total purchase price	18,440
VIRGINIA | Leaseholds and Leasehold Improvements [Member]
Transaction to Real Estate Investments [Line Items]
Total purchase price	3,218
VIRGINIA | Below Market Lease Liabilities [Member]
Transaction to Real Estate Investments [Line Items]
Total purchase price	3,915
Joint Venture Agreement [Member]
Transaction to Real Estate Investments [Line Items]
Total purchase price	154,000
Joint Venture Agreement [Member] | Land
Transaction to Real Estate Investments [Line Items]
Total purchase price	21,581
Joint Venture Agreement [Member] | Building
Transaction to Real Estate Investments [Line Items]
Total purchase price	97,133
Joint Venture Agreement [Member] | Site Improvements
Transaction to Real Estate Investments [Line Items]
Total purchase price	12,952
Joint Venture Agreement [Member] | Tenant Improvements [Member]
Transaction to Real Estate Investments [Line Items]
Total purchase price	9,601
Joint Venture Agreement [Member] | Real Estate Investment
Transaction to Real Estate Investments [Line Items]
Total purchase price	141,267
Joint Venture Agreement [Member] | Leaseholds and Leasehold Improvements [Member]
Transaction to Real Estate Investments [Line Items]
Total purchase price	22,555
Joint Venture Agreement [Member] | Above Market Lease [Member]
Transaction to Real Estate Investments [Line Items]
Total purchase price	5,463
Joint Venture Agreement [Member] | Below Market Lease Liabilities [Member]
Transaction to Real Estate Investments [Line Items]
Total purchase price	$ 15,285