Note 8 - Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

	Year Ended December 31,
	2022			2021			2020
Stock-based compensation expense, gross	$	22		$	14		$	16
Income tax benefit at our statutory rate associated with stock-based compensation		(6	)		(4	)		(4	)
Stock-based compensation expense, net	$	16		$	10		$	12

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

	Year Ended December 31,
	2022					2021					2020
				Weighted-					Weighted-					Weighted-
				Average					Average					Average
	Number			Grant Date		Number			Grant Date		Number			Grant Date
	of			Fair Value		of			Fair Value		of			Fair Value
	Shares			Per Share		Shares			Per Share		Shares			Per Share
Restricted stock - common:
Outstanding - beginning of period		1,035,728		$	19.69		917,533		$	16.84		977,547		$	15.45
Granted		400,927			21.68		731,374			19.73		359,481			18.92
Vested		(438,910	)		19.38		(613,179	)		15.48		(333,865	)		15.35
Forfeited		-			-		-			-		(85,630	)		15.53
Outstanding - end of period		997,745		$	20.62		1,035,728		$	19.69		917,533		$	16.84
Restricted stock - Class A common:
Outstanding - beginning of period		720,421		$	18.22		480,042		$	16.10		449,284		$	13.55
Granted		250,448			20.52		488,918			18.66		166,814			19.87
Vested		(293,631	)		17.55		(248,539	)		15.00		(136,056	)		12.32
Outstanding - end of period		677,238		$	19.36		720,421		$	18.22		480,042		$	16.10
Restricted stock units - common:
Outstanding - beginning of period		125,247		$	19.02		90,184		$	18.92		398,000		$	18.21
Granted		259,079			23.87		95,115			19.05		93,184			18.77
Vested		(108,921	)		19.03		(60,052	)		18.92		(374,500	)		18.18
Forfeited		(1,260	)		19.05		-			-		(26,500	)		18.21
Outstanding - end of period		274,145		$	23.60		125,247		$	19.02		90,184		$	18.92