Schedule of Other Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Schedule of Other Assets [Line Items]
Debt issuance costs, less accumulated amortization of $2,711 and $1,633, respectively	$ 2,518	$ 3,526
Intangible lease value, less accumulated amortization of $6,920 and $4,990, respectively	34,668	36,598
Other intangible assets, less accumulated amortization of $2,625 and $1,421, respectively	8,585	4,434
Deferred leasing costs	6,738	7,380
Cash equivalents and cash surrender value of life insurance held in Rabbi trust	13,537	13,110
Straight-line rent receivable	9,335	9,229
Other	13,337	8,725
Other assets, total	$ 88,718	$ 83,002