Related Party Transactions - Additional Information (Detail) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
Dec. 31, 2015 |
|
| Related Party Transactions [Abstract] | |||||
| Management fees | $ 1,574 | $ 955 | $ 4,121 | $ 2,630 | |
| Related party receivable | $ 900 | $ 900 | $ 600 | ||