Customer Deposits (Details Textuals)	Dec. 31, 2017 M
Customer Deposits Textuals [Abstract]
Weighted Average Rate Domestic Deposit Certificates Of Deposit	2.15%
Weighted Average Maturity of Certificate of Deposits (in Months)	45

The weighted average interest rate for domestic certificates of deposit liabilities.

No definition available.

Name:	us-gaap_WeightedAverageRateDomesticDepositCertificatesOfDeposit
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant