Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Goodwill And Intangible Assets Disclosure [Abstract] | |||
| Amortization expense for other intangible assets | $ 14.4 | $ 15.4 | $ 16.6 |