Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Additional Information (Detail)

v3.6.0.2
Commitments and Contingencies - Additional Information (Detail)
$ in Millions
12 Months Ended
Dec. 31, 2016
USD ($)
lease
Dec. 31, 2015
USD ($)
Commitments and Contingencies Disclosure [Abstract]    
Number of ground leases | lease 4  
Expenses incurred for the properties listed $ 0.5 $ 0.4
Letters of credit, outstanding $ 0.8