Quarterly report pursuant to Section 13 or 15(d)

Debt (Details)

v3.5.0.2
Debt (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Debt Instrument [Line Items]          
Debt outstanding $ 234.0   $ 234.0   $ 235.0
Deferred financing costs 1.9   $ 1.9   2.2
LIBOR [Member]          
Debt Instrument [Line Items]          
Base margin     2.25%    
Base Rate [Member]          
Debt Instrument [Line Items]          
Base margin     1.00%    
Amended and Restated [Member]          
Debt Instrument [Line Items]          
Debt instrument, maturity date     Jan. 28, 2020    
Financing costs $ 2.7   $ 2.7    
Amortization period of debt issuance costs     5 years    
Revolving loans potential increment in maximum borrowing capacity     $ 75.0    
Duration of interest rate cash flow hedge 3 years        
Effective interest rate 3.13%   3.13%    
Interest expense, net $ 1.9 $ 1.9 $ 3.8 $ 3.4  
Amended and Restated [Member] | Maximum [Member]          
Debt Instrument [Line Items]          
Interest rate range 4.50%   4.50%    
Amended and Restated [Member] | Minimum [Member]          
Debt Instrument [Line Items]          
Interest rate range 2.69%   2.69%    
Amended and Restated [Member] | Swap [Member]          
Debt Instrument [Line Items]          
Derivative notional amount $ 100.0   $ 100.0    
Term Loan Facility [Member]          
Debt Instrument [Line Items]          
Borrowings outstanding 125.3   125.3    
Long-term Debt, Fiscal Year Maturity [Abstract]          
Term loan payments 2016 9.4   9.4    
Term loan payments 2017 21.6   21.6    
Term loan payments 2018 28.1   28.1    
Term loan payments 2019 30.0   30.0    
Term loan payments 2020 36.2   36.2    
Revolving Loan Facility [Member]          
Debt Instrument [Line Items]          
Revolving loans maximum borrowing capacity 150.0   150.0    
Revolving loans amount outstanding 109.0   109.0   101.0
Letters of credit outstanding $ 0.0   $ 0.0   $ 0.0