Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2012

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

Share-Based Compensation Arrangement Expenses Recognized

(Dollars in thousands)	Years ended December 31,
	2012			2011			2010
Salaries, wages and employee benefits	$	14,464		$	12,764		$	15,020
Deferred income tax benefit	(5,616		)	(4,935		)	(5,803		)
Net share-based compensation expense	$	8,848		$	7,829		$	9,217

Summary Of Nonvested Stock Activity

	Number of Awards		Weighted- Average Grant-Date Fair Value
Outstanding at December 31, 2011	864,533		$	28.00
Awarded – Employees	312,817		30.37
Awarded – Directors	25,180		33.75
Vested	(341,345	)	22.32
Forfeited	(43,866	)	31.91
Outstanding at December 31, 2012	817,319		$	31.25

Schedule of Nonvested Performance-based Units Activity

	Number of Awards		Weighted- Average Grant-Date Fair Value
Outstanding at December 31, 2011	—		$	—
Awarded	252,557		29.67
Forfeited	(16,573	)	29.67
Outstanding at December 31, 2012	235,984		$	29.67

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, 2011	2,650,863		$	35.59
Granted	9,007		29.73
Exercised	(150,213	)	23.70
Expired or cancelled	(109,397	)	41.36
Outstanding at December 31, 2012	2,400,260		$	36.05	4.93	$	4,432
Exercisable at December 31, 2012	2,012,356		$	36.76	4.31	$	4,415

Schedule Of Share Based Compensation Stock Options Exercise Activity

(Dollars in thousands)	2012		2011		2010
Aggregate intrinsic value of exercised options	$	1,614	$	3,513	$	1,925
Cash received from exercise of options	3,560		5,532		3,459
Tax benefit realized from exercise of options	629		1,370		751

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

	2012			2011			2010
Estimated fair value	$	11.79		$	12.64		N/A
Risk-free interest rate	0.7		%	2.2		%	N/A
Expected term (years)	4.91			4.73			N/A
Expected volatility	52		%	48		%	N/A
Expected dividend yield	1.37		%	1.24		%	N/A

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, 2011	523,106		$	28.92
Exercised	(15,748	)	28.92
Outstanding at December 31, 2012	507,358		$	28.92	7.11	—
Exercisable at December 31, 2012	348,712		$	28.92	7.11	—

Schedule Of Share Based Compensation Stock Options Exercise Activity SARS

(Dollars in thousands)	2012		2011		2010
Cash paid to settle exercised SARs	$	51	$	559	$	148
Realized tax benefit	20		218		58

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

	2010
Estimated fair value	$	10.78
Risk-free interest rate	2.4		%
Expected term (years)	4.30
Expected volatility	48		%
Expected dividend yield	1.38		%