Note 8 - Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2014

Earnings Per Share [Abstract]

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2014		2013		2014		2013
Numerator- net income	$	54,025	$	28,254	$	88,726	$	78,928
Denominator- weighted average shares
Basic		68,538,251		68,140,330		68,481,682		68,003,164
Dilutive effect of stock compensation awards (1)		1,549,725		1,669,269		1,606,756		1,798,334
Diluted		70,087,976		69,809,599		70,088,438		69,801,498
Net income per share
Basic	$	0.79	$	0.41	$	1.30	$	1.16
Diluted	$	0.77	$	0.40	$	1.27	$	1.13