XML 208 R190.htm IDEA: XBRL DOCUMENT v3.8.0.1
21) Mortgage Servicing Rights: Summary of Unpaid Principal Balances of the Servicing Portfolio (Details) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Details    
Servicing Unpaid Principal Balance $ 2,924,868,843 $ 2,720,441,340