Principal Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2013

Accounting Policies [Abstract]

Calculation Of Diluted Earnings Per Share

(Dollars in thousands except per share data)	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Numerator:
Net income	$	30,557	$	25,304	$	87,459	$	92,750
Denominator:
Weighted-average common shares outstanding	56,714,423		55,906,636		56,390,621		55,806,937
Stock options and nonvested stock	648,411		556,899		674,525		625,279
	57,362,834		56,463,535		57,065,146		56,432,216
Diluted Earnings per Share:	$	0.53	$	0.45	$	1.53	$	1.64
Anti-dilutive securities excluded from the
computation of diluted EPS	930,616		1,818,992		954,749		1,779,609