Consolidated Statements of Changes in Shareholders' Equity $ in Thousands	USD ($)
Total shareholders’ equity at beginning of period at Dec. 31, 2014	$ 2,851,403
Net income	221,090
Other comprehensive income (loss)	(7,898)
Stock option exercises (908,921 shares in 2016 and 227,851 shares in 2015)	11,830
Stock compensation expense recognized in earnings	7,679
Tax benefits related to stock compensation	880
Purchase of treasury stock (1,095,308 shares in 2015)	(74,947)
Cash dividends – preferred stock (approximately $1.01 per share in both 2016 and in 2015)	(6,047)
Cash dividends – common stock ($1.61 per share in 2016 and $1.57 per share in 2015)	(99,017)
Total shareholders’ equity at end of period at Sep. 30, 2015	2,904,973
Total shareholders’ equity at beginning of period at Dec. 31, 2015	2,890,343
Net income	220,542
Other comprehensive income (loss)	101,650
Stock option exercises (908,921 shares in 2016 and 227,851 shares in 2015)	47,873
Stock compensation expense recognized in earnings	7,998
Tax benefits related to stock compensation	0
Purchase of treasury stock (1,095,308 shares in 2015)	0
Cash dividends – preferred stock (approximately $1.01 per share in both 2016 and in 2015)	(6,047)
Cash dividends – common stock ($1.61 per share in 2016 and $1.57 per share in 2015)	(100,563)
Total shareholders’ equity at end of period at Sep. 30, 2016	$ 3,161,796