Note 11 - Shareholders' Equity (Tables)

3 Months Ended

Mar. 31, 2019

Notes Tables

Schedule of Stockholders Equity [Table Text Block]

	Common Stock																	Accumulated
	Shares Outstanding						$0.01 Par		Additional Paid-In			Treasury			Retained			Other Comprehensive
(in thousands)	Class A			Class B			Value		Capital			Stock			Earnings			Income		Total
Balance, December 31, 2018		28,710			8,290		$	458	$	370,025		$	(245,842	)	$	942,287		$	–	$	1,066,928
Stock options exercised and stock awards		59			–			1		1,230			–			–			–		1,231
Stock-based compensation related to stock options, restricted shares and employee stock purchase plan		–			–			–		8,836			–			–			–		8,836
Vesting of restricted share awards		–			226			2		(2,317	)		–			–			–		(2,315	)
Issuance of common stock under employee stock purchase plan		57			–			1		1,680			–			–			–		1,681
Common stock repurchases		(639	)		(53	)		–		–			(26,048	)		–			–		(26,048	)
Dividend Class A common stock		–			–			–		–			–			(3,389	)		–		(3,389	)
Dividend Class B common stock		–			–			–		–			–			(991	)		–		(991	)
Other comprehensive income		–			–			–		–			–			–			384		384
Net income		–			–			–		–			–			37,104			–		37,104
Balance, March 31, 2019		28,187			8,463		$	462	$	379,454		$	(271,890	)	$	975,011		$	384	$	1,083,421

	Common Stock
	Shares Outstanding						$0.01 Par		Additional Paid-In			Treasury			Retained
(in thousands)	Class A			Class B			Value		Capital			Stock			Earnings		Total
Balance, December 31, 2017		31,345			8,469		$	454	$	348,044		$	(120,682	)	$	812,557	$	1,040,373
Stock options exercised and stock awards		30			–			–		766			–			–		766
Stock-based compensation related to stock options, restricted shares and employee stock purchase plan		–			–			–		7,893			–			–		7,893
Vesting of restricted share awards		1			226			2		(1,621	)		–			–		(1,619	)
Issuance of common stock under employee stock purchase plan		41			–			1		1,353			–			–		1,354
Common stock repurchases		(834	)		(72	)		–		–			(38,137	)		–		(38,137	)
Net income		–			–			–		–			–			21,039		21,039
Balance, March 31, 2018		30,583			8,623		$	457	$	356,435		$	(158,819	)	$	833,596	$	1,031,669