Note 1. Principal Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2014

Accounting Policies [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Three Months Ended September 30,				Nine Months Ended September 30,
(Dollars in thousands, except per share data)	2014		2013		2014		2013
Numerator:
Net income	$	45,583	$	30,557	$	112,143	$	87,459
Denominator:
Weighted-average common shares outstanding	57,692,508		56,714,423		57,262,132		56,390,621
Stock options and nonvested stock	561,055		648,411		570,001		674,525
	58,253,563		57,362,834		57,832,133		57,065,146
Diluted EPS	$	0.78	$	0.53	$	1.94	$	1.53
Anti-dilutive stock options excluded from the calculation of diluted EPS	157,000		930,616		518,570		954,749