Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events New Debt (Details)

v3.10.0.1
Subsequent Events New Debt (Details)
$ in Thousands, ¥ in Millions
6 Months Ended 9 Months Ended
Oct. 29, 2018
USD ($)
Sep. 30, 2018
USD ($)
shares
Sep. 30, 2017
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2018
JPY (¥)
Oct. 29, 2018
JPY (¥)
Mar. 31, 2018
USD ($)
shares
Debt              
Long-term Debt   $ 316,637         $ 324,623
Gain (Loss) on Extinguishment of Debt   $ 0 $ (486)        
Common Stock, Shares, Issued | shares   57,435,867         56,641,000
Term Loan Credit Agreement [Member]              
Debt              
Long-term Debt, Gross   $ 323,400          
Subsequent Event [Member] | Term Loan Credit Agreement [Member]              
Debt              
Gain (Loss) on Extinguishment of Debt $ 15,800            
Subsequent Event [Member] | Term Loan A Tranche [Member] | Term Loan Facility [Member]              
Debt              
Interest rate of senior notes (as a percent) 2.00%         2.00%  
Subsequent Event [Member] | Term Loan B Tranche [Member] [Member] | Term Loan Facility [Member]              
Debt              
Interest rate of senior notes (as a percent) 2.25%         2.25%  
Japan, Yen | Subsequent Event [Member] | Term Loan Facility [Member]              
Debt              
Long-term Debt | ¥           ¥ 33,000.0  
Japan, Yen | Subsequent Event [Member] | Term Loan A Tranche [Member] | Term Loan Facility [Member]              
Debt              
Long-term Debt | ¥           16,500.0  
Long-term Debt, Maturities, Repayment Terms | ¥         ¥ 1,400.0    
Japan, Yen | Subsequent Event [Member] | Term Loan B Tranche [Member] [Member] | Term Loan Facility [Member]              
Debt              
Long-term Debt | ¥           ¥ 16,500.0  
United States of America, Dollars | Subsequent Event [Member] | Term Loan Facility [Member]              
Debt              
Long-term Debt $ 296,000            
United States of America, Dollars | Subsequent Event [Member] | Term Loan A Tranche [Member] | Term Loan Facility [Member]              
Debt              
Long-term Debt 148,000            
Long-term Debt, Maturities, Repayment Terms       $ 12,300      
United States of America, Dollars | Subsequent Event [Member] | Term Loan B Tranche [Member] [Member] | Term Loan Facility [Member]              
Debt              
Long-term Debt $ 148,000