Quarterly report pursuant to Section 13 or 15(d)

Business and Summary of Significant Accounting Principles (Surcharges Reported Gross) (Details)

v3.7.0.1
Business and Summary of Significant Accounting Principles (Surcharges Reported Gross) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Surcharges reported gross $ 831 $ 1,031