Quarterly report pursuant to Section 13 or 15(d)

Nature of Business and Basis of Presentation (Details)

v3.8.0.1
Nature of Business and Basis of Presentation (Details)
$ in Millions
Jan. 01, 2018
USD ($)
Mar. 31, 2018
contract
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]    
Revenue from contracts with customer, number of contracts | contract   3
Accounting Standards Update 2014-09    
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]    
Cumulative effect on retained earnings | $ $ 1.7