Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-Based Compensation Arrangement Expenses Recognized

	Years ended December 31,
(Dollars in thousands)	2014			2013			2012
Salaries, wages and employee benefits	$	20,035		$	20,783		$	14,464
Deferred income tax benefit	(7,673		)	(8,090		)	(5,616		)
Net share-based compensation expense	$	12,362		$	12,693		$	8,848

Summary Of Nonvested Stock Activity

	Number of Awards		Weighted- Average Grant-Date Fair Value
Outstanding at December 31, 2013	823,070		$	32.15
Awarded – Employees	222,253		36.94
Awarded – Directors	22,480		44.47
Vested	(277,451	)	32.85
Forfeited	(19,274	)	33.75
Outstanding at December 31, 2014	771,078		$	33.60

Schedule of Nonvested Performance-based Units Activity

	Number of Awards		Weighted- Average Grant-Date Fair Value
Outstanding at December 31, 2013	437,015		$	31.02
Awarded	205,667		36.47
Forfeited	(13,117	)	33.22
Outstanding at December 31, 2014	629,565		$	32.75

Summary Of Stock-Option Activity

	Number of Options		Weighted- Average Exercise Price		Weighted-Average Remaining Contractual Term (years)	Aggregate Intrinsic Value (in thousands)
Outstanding at December 31, 2013	1,488,741		$	39.59
Exercised	(926,454	)	36.59
Expired or cancelled	(15,100	)	50.28
Outstanding at December 31, 2014	547,187		$	44.36	2.88	$	3,461
Exercisable at December 31, 2014	544,184		$	44.44	2.86	$	3,403

Schedule Of Share Based Compensation Stock Options Exercise Activity

(Dollars in thousands)	2014		2013		2012
Aggregate intrinsic value of exercised options	$	12,177	$	9,868	$	1,614
Cash received from exercise of options	33,902		20,777		3,560
Tax benefit realized from exercise of options	4,664		3,848		629

Summary Of Weighted-Average Assumptions Used In The Black-Scholes Option-Pricing Model

	2012
Estimated fair value	$	11.79
Risk-free interest rate	0.7		%
Expected term (years)	4.91
Expected volatility	52		%
Expected dividend yield	1.37		%

Summary Of Stock Appreciation Rights

	Number of Rights		Weighted- Average Exercise Price		Weighted-Average Remaining Contractual Term (years)	Aggregate Intrinsic Value (in thousands)
Outstanding at December 31, 2013	283,221		$	28.92
Exercised	(175,990	)	28.92
Outstanding at December 31, 2014	107,231		$	28.92	5.11	$	2,173
Exercisable at December 31, 2014	107,231		$	28.92	5.11	$	2,173

Schedule Of Share Based Compensation Stock Options Exercise Activity SARS

(Dollars in thousands)	2014		2013		2012
Cash paid to settle exercised SARs	$	3,623	$	2,382	$	51
Realized tax benefit	1,388		929		20