Borrowed Funds and Debt Obligations - Narrative (Details) - loan	Mar. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Federal Home Loan Bank, number of variable rate advances (in loans)	2	2
FHLB advance number one
Debt Instrument [Line Items]
Interest rate of Federal Home Loan Bank advances	0.60%	0.45%
FHLB advance number two
Debt Instrument [Line Items]
Interest rate of Federal Home Loan Bank advances	0.60%	0.45%
Minimum
Debt Instrument [Line Items]
Interest rate of Federal Home Loan Bank advances	0.75%	0.70%
Maximum
Debt Instrument [Line Items]
Interest rate of Federal Home Loan Bank advances	2.46%	2.46%