Note 9 - Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2014

Earnings Per Share [Abstract]

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2014		2013		2014		2013
Numerator- net income	$	36,497	$	47,093	$	125,223	$	126,021
Denominator- weighted average shares
Basic		68,556,051		68,198,006		68,511,409		68,026,705
Dilutive effect of stock compensation awards (1)		1,477,173		1,689,019		1,539,544		1,600,510
Diluted		70,033,224		69,887,025		70,050,953		69,627,215
Net income per share
Basic	$	0.53	$	0.69	$	1.83	$	1.85
Diluted	$	0.52	$	0.67	$	1.79	$	1.81