Quarterly report pursuant to Section 13 or 15(d)

Debt (Details)

v3.2.0.727
Debt (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Long-term Debt, Fiscal Year Maturity [Abstract]          
Debt outstanding $ 243,200   $ 243,200   $ 48,600
LIBOR [Member]          
Long-term Debt, Fiscal Year Maturity [Abstract]          
Base margin (in hundredths)     2.25%    
Base Rate [Member]          
Long-term Debt, Fiscal Year Maturity [Abstract]          
Base margin (in hundredths)     1.00%    
Amended and Restated [Member]          
Debt Instrument [Line Items]          
Maturity date     Jan. 28, 2020    
Financing costs $ 2,700   $ 2,700    
Amortization period of debt issuance costs     5 years    
Long-term Debt, Fiscal Year Maturity [Abstract]          
Revolving loans potential increment in maximum borrowing capacity     $ 75,000    
Duration of interest rate cash flow hedge     3 years    
Interest rate range, minimum (in hundredths)     2.44%    
Interest rate range, maximum (in hundredths)     4.25%    
Effective interest rate (in hundredths) 2.97%   2.97%    
Interest expense, net $ 1,900 $ 586 $ 3,400 $ 1,300  
Amended and Restated [Member] | Swap [Member]          
Long-term Debt, Fiscal Year Maturity [Abstract]          
Derivative notional amount 125,000   125,000    
Term loan Facility [Member]          
Long-term Debt, Fiscal Year Maturity [Abstract]          
Term loan payments 2015 7,500   7,500    
Term loan payments 2016 17,800   17,800    
Term loan payments 2017 21,600   21,600    
Term loan payments 2018 28,100   28,100    
Term loan payments 2019 30,000   30,000    
Term loan payments after 2019 41,300   41,300    
Borrowings outstanding 146,300   146,300    
Revolving Loan Facility [Member]          
Long-term Debt, Fiscal Year Maturity [Abstract]          
Revolving loans maximum borrowing capacity 150,000   150,000    
Revolving loans amount outstanding 97,000   97,000   23,600
Letters of credit outstanding $ 0   $ 0   $ 0