Note 1. Principal Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2015

Accounting Policies [Abstract]

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

	Three Months Ended March 31,
(Dollars in thousands, except per share data)	2015		2014
Numerator:
Net income	$	21,792	$	12,893
Denominator:
Weighted-average common shares outstanding - Basic	57,634,382		56,957,433
Stock options and nonvested stock	587,784		582,635
Weighted-average common shares outstanding - Diluted	58,222,166		57,540,068
Diluted EPS	$	0.37	$	0.22
Anti-dilutive stock options excluded from the calculation of diluted EPS	287,050		899,241