Note 4 - Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Numerator:
Numerator for basic and diluted earnings per share – Net income available to common shareholders	$	41,665	$	29,784	$	92,093	$	66,262
Denominator:
Denominator for basic earnings per share – weighted average shares outstanding		39,309		39,825		39,480		39,560
Effect of dilutive securities– Employee and director stock options and restricted share awards		1,079		1,321		1,155		1,270
Denominator for diluted earnings per share – adjusted weighted average shares outstanding and assumed conversions		40,388		41,146		40,635		40,830
Basic earnings per common share	$	1.06	$	.75	$	2.33	$	1.68
Diluted earnings per common share and common share equivalents	$	1.03	$	.72	$	2.27	$	1.62

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Weighted average anti-dilutive options		455		406		432		599