Quarterly report pursuant to Section 13 or 15(d)

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

v3.7.0.1
Fair Value Remeasurement Based on Significant Inputs Not Observable (Parenthetical) (Detail) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Fair value of liabilities settlements [1] $ 0.2  
Cash    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Fair value of liabilities settlements 0.7 $ 0.9
Common Stock    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Fair value of liabilities settlements 0.5 0.6
Cash and Cash Equivalents    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Fair value of liabilities settlements $ 0.9 $ 1.5
[1] Such acquisition liabilities were settled in common stock.