Subsequent Events (Details) - Subsequent Event $ in Millions	May 08, 2017 USD ($)
Subsequent Event [Line Items]
Multiemployer plan, withdrawal liability	$ 35.6
Statutory period after voluntary withdrawal with additional exposure to company (in years)	2 years

Amount of the obligation recognized by withdrawing from a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers.

No definition available.

Name:	us-gaap_MultiemployerPlansWithdrawalObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant