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	145,240
Other comprehensive income (loss)	(59,517)
Stock option exercises (67,075 shares in 2016 and 171,474 shares in 2015)	8,950
Stock compensation expense recognized in earnings	5,337
Tax benefits related to stock compensation	750
Purchase of treasury stock (140,571 shares in 2015)	(10,594)
Cash dividends – preferred stock (approximately $0.67 per share in both 2016 and in 2015)	(4,031)
Cash dividends – common stock ($1.07 per share in 2016 and $1.04 per share in 2015)	(65,871)
Total shareholders’ equity at end of period at Jun. 30, 2015	2,871,667
Total shareholders’ equity at beginning of period at Dec. 31, 2015	2,890,343
Net income	140,258
Other comprehensive income (loss)	167,494
Stock option exercises (67,075 shares in 2016 and 171,474 shares in 2015)	3,586
Stock compensation expense recognized in earnings	5,477
Tax benefits related to stock compensation	65
Purchase of treasury stock (140,571 shares in 2015)	0
Cash dividends – preferred stock (approximately $0.67 per share in both 2016 and in 2015)	(4,031)
Cash dividends – common stock ($1.07 per share in 2016 and $1.04 per share in 2015)	(66,524)
Total shareholders’ equity at end of period at Jun. 30, 2016	$ 3,136,668