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Note 12 - Equity-based Compensation (Tables)

9 Months Ended

Sep. 30, 2021

Notes Tables

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

		Three Months Ended September 30,								Nine Months Ended September 30,
		2021				2020				2021				2020
Restricted Stock		$	4,656			$	3,072			$	12,629			$	8,257
SARs			772				795				2,205				2,257
Total		$	5,428			$	3,867			$	14,834			$	10,514

Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]

						Weighted
						Average Grant
		Restricted				Date Fair Value
		Stock				Per Share
Outstanding as of December 31, 2020			34,944			$	1,037.83
Granted			11,983			$	2,157.55
Forfeited			(1,328	)		$	1,404.28
Vested and issued			(11,241	)		$	866.89
Outstanding as of September 30, 2021			34,358			$	1,470.12
Vested and deferred as of September 30, 2021			5,978			$	756.32

Share-based Payment Arrangement, Stock Appreciation Right, Activity [Table Text Block]

																		Weighted
										Weighted								Average
						Weighted				Average				Aggregate				Remaining
		Stock				Average				Grant				Intrinsic				Contractual
		Appreciation				Exercise				Date Fair				Value				Term
		Rights				Price				Value				(in thousands)				(in years)
Outstanding as of December 31, 2020			58,365			$	866.54			$	204.29			$	79,446				7.3
Granted			3,500			$	2,041.73			$	548.01			$	-				9.5
Exercised			(13,779	)		$	597.19			$	133.96			$	18,948				-
Forfeited			(1,601	)		$	834.92			$	201.50
Outstanding as of September 30, 2021			46,485			$	1,035.95			$	251.11			$	37,042				7.2
Exercisable as of September 30, 2021			20,673			$	748.02			$	174.45			$	22,019				6.3

Schedule of Share-based Payment Award, Other than Options, Valuation Assumptions [Table Text Block]

		Inputs
Expected volatility			27.47	%
Risk-free interest rate			0.86	%
Expected term (in years)			6.25
Expected dividend yield			0.49	%

X

- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of awards excluding options (for example, stock appreciation rights, restricted stock, phantom stock), including, but not limited to: (a) expected term of awards, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock appreciation rights awards that were outstanding at the beginning and end of the year, and the number of stock appreciation rights awards that were granted, exercised or converted, forfeited, and expired during the year.

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