Executive Retirement (Detail)
$ in Millions
|9 Months Ended|
Sep. 30, 2018
|Restructuring and Related Activities [Abstract]|
|Separation Agreement, Consulting Fees||$ 0.3|
|Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost||$ 0.6|
Additional share-based compensation cost recognized as a result of an occurrence of an event that accelerates its recognition.
No definition available.