Borrowed Funds and Mandatorily Redeemable Securities (Details 2) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Short-term borrowings:
Short-term borrowings	$ 199,344	$ 214,595
Short-term borrowings, weighted average interest rate	1.30%	0.57%
Federal funds purchased
Short-term borrowings:
Short-term borrowings	$ 10,000	$ 56,000
Short-term borrowings, weighted average interest rate	2.70%	1.63%
Security repurchase agreements
Short-term borrowings:
Short-term borrowings	$ 103,627	$ 149,834
Short-term borrowings, weighted average interest rate	0.25%	0.20%
Commercial paper
Short-term borrowings:
Short-term borrowings	$ 4,325	$ 6,115
Short-term borrowings, weighted average interest rate	0.29%	0.27%
Federal Home Loan Bank advances
Short-term borrowings:
Short-term borrowings	$ 80,000	$ 0
Short-term borrowings, weighted average interest rate	2.57%	0.00%
Other short-term borrowings
Short-term borrowings:
Short-term borrowings	$ 1,392	$ 2,646
Short-term borrowings, weighted average interest rate	0.00%	0.00%