Cash and Cash Equivalents

6 Months Ended

Jun. 30, 2016

Cash and Cash Equivalents [Abstract]

Cash and Cash Equivalents

Cash and Cash Equivalents

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

(Dollars in thousands)	June 30, 2016		December 31, 2015
Cash and due from banks (1)	$	1,533,270	$	1,372,743
Securities purchased under agreements to resell (2)	316,059		125,391
Other short-term investment securities	5,128		5,123
Total cash and cash equivalents	$	1,854,457	$	1,503,257

(1) At June 30, 2016 and December 31, 2015, $542 million 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 $666 million and $500 million, respectively.

(2) At June 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$322 millionand $128 million, respectively. None of these securities received as collateral were sold or pledged as of June 30, 2016 or December 31, 2015.