Recent Accounting Pronouncements - Additional Information (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| New Accounting Pronouncements Or Change In Accounting Principle [Line Items] | |||
| Net cash used in investing activities | $ 53.0 | $ 47.1 | $ 61.2 |
| Effect of exchange rate changes on cash, cash equivalents and restricted cash | $ (5.3) | (8.5) | (10.0) |
| ASU 2016-18 | |||
| New Accounting Pronouncements Or Change In Accounting Principle [Line Items] | |||
| Net cash used in investing activities | 47.1 | 61.2 | |
| Effect of exchange rate changes on cash, cash equivalents and restricted cash | (8.5) | (10.0) | |
| ASU 2016-18 | Scenario Previously Reported | |||
| New Accounting Pronouncements Or Change In Accounting Principle [Line Items] | |||
| Net cash used in investing activities | 46.8 | 54.0 | |
| Effect of exchange rate changes on cash, cash equivalents and restricted cash | $ (8.4) | $ (9.4) | |