Parent Company Only Financial Information, Balance Sheet (Details) - USD ($) $ in Thousands		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Assets
Cash and due from banks		$ 373,380	$ 507,187
Interest-bearing deposits in other financial institutions		207,624	221,226
Other assets(a)	[1]	597,242	516,538
Total assets		32,386,478	33,615,122
Liabilities and stockholders' equity
Commercial paper		32,016	45,423
Subordinated notes, at par		250,000	250,000
Long-term funding capitalized costs		2,866	4,389
Total long-term funding		3,210,310
Other Liabilities		489,868	409,787
Total liabilities		28,464,355	29,834,235
Preferred equity		256,716	256,716
Common equity		1,752	1,752
Total stockholders’ equity		3,922,124	3,780,888	$ 3,237,443	$ 3,091,312
Total liabilities and stockholders’ equity		32,386,478	33,615,122
Parent Company Only
Assets
Cash and due from banks		17,427	16,245
Interest-bearing deposits in other financial institutions		27,186	38,374
Notes and interest receivable from subsidiaries		201,551	453,615
Investments in and receivable due from subsidiaries		3,925,596	3,787,574
Other assets(a)		46,234	47,448
Total assets		4,217,994	4,343,256
Liabilities and stockholders' equity
Commercial paper		32,016	45,423
Senior notes, at par		0	250,000
Subordinated notes, at par		250,000	250,000
Long-term funding capitalized costs		(1,428)	(2,043)
Total long-term funding		248,572	497,957
Other Liabilities		15,282	18,988
Total liabilities		295,870	562,368
Preferred equity		256,716	256,716
Common equity		3,665,407	3,524,171
Total stockholders’ equity		3,922,124	3,780,888
Total liabilities and stockholders’ equity		$ 4,217,994	$ 4,343,256

[1] (a) During the third quarter of 2019, the Corporation made a change in accounting policy to offset derivative assets and liabilities and cash collateral with the same counterparty where it has a legally enforceable master netting agreement in place. The change had no impact on either earnings or equity. The Corporation believes that this change is a preferable method of accounting as it provides a better reflection of the assets and liabilities on the face of the consolidated balance sheets. Adoption of this change was voluntary and has been adopted retrospectively with all prior periods presented herein revised.