Cash and Cash Equivalents (Tables)

6 Months Ended

Jun. 30, 2018

Cash and Cash Equivalents [Abstract]

Cash and Cash Equivalents

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

(Dollars in thousands)	June 30, 2018		December 31, 2017
Cash and due from banks (1)	$	2,670,473	$	2,672,290
Securities purchased under agreements to resell (2)	37,379		247,876
Other short-term investment securities	4,249		2,909
Total cash and cash equivalents	$	2,712,101	$	2,923,075

(1) At June 30, 2018 and December 31, 2017, $645.8 million and $624.0 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 $1.0 billion and $1.1 billion, respectively.

(2) At June 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$38.1 millionand $252.8 million, respectively. None of these securities were sold or repledged as of June 30, 2018 and December 31, 2017.