XML 56 R43.htm IDEA: XBRL DOCUMENT v3.19.1
Summary of Significant Accounting Policies - Premises and Equipment (Details)
12 Months Ended
Dec. 31, 2018
Furniture and equipment  
Property, Plant and Equipment [Line Items]  
Premises and equipment useful life 8 years
Minimum | Equipment  
Property, Plant and Equipment [Line Items]  
Premises and equipment useful life 3 years
Maximum | Equipment  
Property, Plant and Equipment [Line Items]  
Premises and equipment useful life 20 years