Annual report pursuant to Section 13 and 15(d)

Fair Value Remeasurement Based on Significant Inputs Not Observable (Detail)

v3.8.0.1
Fair Value Remeasurement Based on Significant Inputs Not Observable (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Fair value, beginning balance $ 3.0 $ 8.8
Fair value of acquisition liabilities paid [1] (1.5) (7.6)
Fair value of consideration issued   4.1
Change in fair value [2] (1.4) (2.3)
Fair value, ending balance $ 0.1 $ 3.0
[1] Acquisition liabilities settled in common stock totaled $1.2 million and $6.6 million during 2017 and 2016, respectively.
[2] Change in fair value includes a reduction due to a change in assumptions utilized in the calculation of purchase price obligations and not meeting applicable thresholds, which were recorded in "Acquisition, severance and transition costs" on the Consolidated Statements of Operations.