Note 7 - Net Income Per Share of Class A and Class B Common Stock (Tables)

3 Months Ended

Mar. 31, 2017

Notes Tables

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

Three Months Ended March 31,	2017					2016
(in thousands, except per share data)	Class A		Class B			Class A		Class B
Net income applicable to common stockholders - basic	$	47,826	$	2,901		$	36,692	$	3,578
Reallocation of net income as a result of conversion of dilutive stock options		1		(1	)		3		(3	)
Reallocation of net income due to conversion of Class B to Class A common shares outstanding		359		—			455		—
Conversion of Class B common shares into Class A common shares		2,534		—			3,102		—
Effect of dilutive stock options on net income		7		(7	)		18		(18	)
Net income applicable to common stockholders - diluted	$	50,727	$	2,893		$	40,270	$	3,557
Weighted average common shares outstanding – basic		23,740		1,440			23,522		2,294
Conversion of Class B common shares into Class A common shares		1,440		—			2,294		—
Effect of dilutive stock options on weighted average common shares		70		—			157		—
Weighted average common shares outstanding – diluted		25,250		1,440			25,973		2,294
Net income per common share - basic	$	2.01	$	2.01		$	1.56	$	1.56
Net income per common share - diluted	$	2.01	$	2.01		$	1.55	$	1.55

Three Months Ended March 31,	2017				2016
Diluted EPS	Class A		Class B		Class A		Class B
Antidilutive Securities
Shares issuable pursuant to stock options not included since they were antidilutive		—		—		20		—