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Note 9 - Equity-based Compensation (Tables)

3 Months Ended

Mar. 31, 2016

Stock Appreciation Rights (SARs) [Member]

Notes Tables

Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]

		201 6
Expected volatility			24.00	%
Risk-free interest rate			1.75	%
Expected term (in years)			6.25
Expected dividend yield			1.45	%

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

						Weighted Average
						Grant Date
		Restricted				Fair Value
		Stock				Per Share
Unvested as of January 1, 2016			39,744			$	383.18
Granted			6,245			$	433.66
Unvested as of March 31, 2016			45,989

Schedule of Share-based Compensation, Stock Appreciation Rights Award Activity [Table Text Block]

		Stock Appreciation Rights				Weighted Average Exercise Price				Weighted Average Fair Value				Aggregate Intrinsic Value				Weighted Average Remaining Contractual Term (in years)
Outstanding as of December 31, 2015			135,600			$	422.31			$	87.22			$	-				9.7
Granted			-				-				-				-				-
Outstanding as of March 31, 2016			135,600			$	422.31			$	87.22			$	-				9.4
Vested and exercisable as of March 31, 2016			-			$	-			$	-			$	-				-

X

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.

+ References

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