Loan Commitments and Other Related Activities Loan Commitments and Other Related Activities - Additional Information (Details)	12 Months Ended
	Dec. 31, 2019
Minimum
Long-term Purchase Commitment [Line Items]
Fixed rate loan commitments	2.82%
Fixed rate loan commitments maturity period	1 year
Maximum
Long-term Purchase Commitment [Line Items]
Fixed rate loan commitments	12.00%
Fixed rate loan commitments maturity period	25 years