Cash and Cash Equivalents (Tables)

9 Months Ended

Sep. 30, 2016

Cash and Cash Equivalents [Abstract]

Cash and Cash Equivalents

The following table details our cash and cash equivalents at September 30, 2016 and December 31, 2015:

(Dollars in thousands)	September 30, 2016		December 31, 2015
Cash and due from banks (1)	$	2,352,469	$	1,372,743
Securities purchased under agreements to resell (2)	163,719		125,391
Other short-term investment securities	5,131		5,123
Total cash and cash equivalents	$	2,521,319	$	1,503,257

(1) At September 30, 2016 and December 31, 2015, $1.3 billion and $405 million, 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 $724 million and $500 million, respectively.

(2) At September 30, 2016 and December 31, 2015, securities purchased under agreements to resell were collateralized by U.S. Treasury securities and U.S. agency securities with aggregate fair values of$167 millionand $128 million, respectively. None of these securities received as collateral were sold or pledged as of September 30, 2016 or December 31, 2015.