Goodwill - Additional Information (Details)	12 Months Ended
	Dec. 31, 2016 USD ($) segment	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Number of operating segments | segment	5
Goodwill impairment loss | $	$ 0	$ 0	$ 0