Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Principles (Details)

v3.10.0.1
Summary of Significant Accounting Principles (Details)
 6 Months Ended
Jun. 30, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]  
Revenue, performance obligation period 1 year
Contract cancellation period 1 year
Card Income  
New Accounting Pronouncements or Change in Accounting Principle [Line Items]  
Revenue, performance obligation period 12 months
Minimum  
New Accounting Pronouncements or Change in Accounting Principle [Line Items]  
Fee percentage of assets under management 0.50%
Maximum  
New Accounting Pronouncements or Change in Accounting Principle [Line Items]  
Fee percentage of assets under management 1.50%