Consolidated Statement of Changes in Stockholders' Equity - 9 months ended Sep. 30, 2017 - USD ($) $ in Thousands	Total	Preferred Stock (Par Value: $0.01):	Common Stock (Par Value: $0.01):	Paid-in Capital in Excess of Par:	Retained Earnings:	Treasury Stock:	Accumulated Other Comprehensive Loss, Net of Tax:
Balance at beginning of year at Dec. 31, 2016	$ 6,123,991		$ 4,871	$ 6,047,558	$ 128,435	$ (160)	$ (56,713)
Net income	329,680				329,680
Purchase of common stock (712,877 shares)						(10,978)
Issuance of preferred stock (515,000 shares)		$ 502,840
Other comprehensive income, net of tax	52,346						52,346
Dividends paid on common stock ($0.51 per share)					(249,094)
Shares issued for restricted stock awards (2,004,212 shares)			20	(11,028)		11,008
Dividends paid on preferred stock ($31.88 per share)	(16,414)				(16,414)
Compensation expense related to restricted stock awards				27,283
Balance at end of period at Sep. 30, 2017	$ 6,759,654	$ 502,840	$ 4,891	$ 6,063,813	$ 192,607	$ (130)	$ (4,367)