Cash and Cash Equivalents

9 Months Ended

Sep. 30, 2018

Cash and Cash Equivalents [Abstract]

Cash and Cash Equivalents

Cash and Cash Equivalents

The following table details our cash and cash equivalents at September 30, 2018 and December 31, 2017:

(Dollars in thousands)	September 30, 2018		December 31, 2017
Cash and due from banks (1)	$	3,697,018	$	2,672,290
Securities purchased under agreements to resell (2)	119,181		247,876
Other short-term investment securities	2,942		2,909
Total cash and cash equivalents	$	3,819,141	$	2,923,075

(1) At September 30, 2018 and December 31, 2017, $2.1 billion and $0.6 billion, respectively, of our cash and due from banks was deposited at the Federal Reserve Bank and was earning interest at the Federal Funds target rate, and interest-earning deposits in other financial institutions were $1.1 billion at both September 30, 2018 and December 31, 2017.

(2) At September 30, 2018 and December 31, 2017, securities purchased under agreements to resell were collateralized by U.S. Treasury securities and U.S. agency securities with aggregate fair values of$124.5 millionand $252.8 million, respectively. None of these securities were sold or repledged as of September 30, 2018 and December 31, 2017.