Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Principles (Details)

v3.8.0.1
Summary of Significant Accounting Principles (Details)
3 Months Ended
Mar. 31, 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%