Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2012

Earnings Per Share [Abstract]

Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]

		Three Months Ended
		March 31,
		2012		2011
BASIC
Weighted average number of common shares outstanding
used in computing basic earnings per share		45,460		44,820
Net income attributable to common stockholders	$	4,871	$	19,684
Earnings per share attributable to common stockholders	$	0.11	$	0.44
DILUTED
Weighted average number of common shares outstanding
used in computing basic earnings per share		45,460		44,820
Add: Assumed exercise of stock options and stock awards		1,475		1,860
		46,935		46,680
Net income attributable to common stockholders	$	4,871	$	19,684
Earnings per share attributable to common stockholders	$	0.10	$	0.42