CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands		Preferred stock	Common stock	Additional paid-in capital	Accumulated other comprehensive income (loss)	Retained earnings	Treasury shares	Total
Balance (As Reported) at Dec. 31, 2013		$ 267,616	$ 54,667	$ 541,210	$ (15,641)	$ 1,918,163	$ (25,029)	$ 2,740,986
Balance at Dec. 31, 2013		267,616	$ 54,667	541,210	(15,641)	1,906,222	(25,029)	2,729,045
Balance (in shares) (As Reported) at Dec. 31, 2013			54,667,295
Balance (in shares) at Dec. 31, 2013			54,667,295
Increase (Decrease) in Stockholders' Equity
Net income	[1]					119,291		119,291
Other comprehensive income (loss), net of tax					17,741			17,741
Issuance of shares under share-based compensation plans			$ 290	9,653			2,581	12,524
Issuance of shares under share-based compensation plans (in shares)			289,544
Share-based employee compensation expense				8,875				8,875
Tax benefit from share-based compensation plans				3,306				3,306
Dividends : Preferred						(8,188)		(8,188)
Dividends: Common						(36,541)		(36,541)
Net change in deferred compensation plans				741			(2)	739
Change in redeemable noncontrolling interest				(7,501)				(7,501)
Balance at Jun. 30, 2014		267,616	$ 54,957	556,284	2,100	1,980,784	(22,450)	2,839,291
Balance (in shares) at Jun. 30, 2014			54,956,839
Balance at Dec. 31, 2014		267,616	$ 55,162	578,046	(7,074)	2,071,230	(22,279)	2,942,701
Balance (in shares) at Dec. 31, 2014			55,162,455
Increase (Decrease) in Stockholders' Equity
Net income	[1]					130,065		130,065
Other comprehensive income (loss), net of tax					5,314			5,314
Issuance of shares under share-based compensation plans			$ 501	21,793			3,666	25,960
Issuance of shares under share-based compensation plans (in shares)			501,192
Share-based employee compensation expense				8,279				8,279
Tax benefit from share-based compensation plans				7,906				7,906
Dividends : Preferred						(8,188)		(8,188)
Dividends: Common						(39,236)		(39,236)
Net change in deferred compensation plans			$ 1	782			(1)	782
Net change in deferred compensation plans (in shares)			480
Change in redeemable noncontrolling interest				(1,435)				(1,435)
Balance at Jun. 30, 2015		$ 267,616	$ 55,664	$ 615,371	$ (1,760)	$ 2,153,871	$ (18,614)	$ 3,072,148
Balance (in shares) at Jun. 30, 2015			55,664,127

[1] Net income excludes net income attributable to redeemable noncontrolling interest of $1,033 and $1,209 for the six-month periods ended June 30, 2015 and 2014, respectively. Redeemable noncontrolling interest is reflected in the mezzanine section of the consolidated balance sheets. See Note 17 of the Notes to the Unaudited Consolidated Financial Statements.