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The cash outflow to reacquire common stock during the period.

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Note 7 - Earnings Per Share ("EPS") (Details Textual) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions				3 Months Ended		6 Months Ended	9 Months Ended
	Aug. 31, 2016	Feb. 29, 2016	Feb. 26, 2016	Sep. 30, 2017	Sep. 30, 2016	Aug. 31, 2016	Sep. 30, 2017	Sep. 30, 2016	Aug. 26, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount				0.5	0.3		0.6	0.4
Payments for Repurchase of Common Stock							$ 0	$ 25,000
Accelerated Stock Repurchase [Member] \| Morgan Stanley & Co., LLC [Member]
Payments for Repurchase of Common Stock			$ 25,000
Stock Repurchased and Retired During Period, Shares	0.1	0.4				0.5
Accelerated Stock Repurchase [Member] \| Morgan Stanley & Co., LLC [Member] \| Common Stock [Member]
Stock Repurchase Program, Authorized Amount			$ 25,000
Accelerated Share Repurchases, Initial Price Paid Per Share		$ 46.40
Accelerated Share Repurchases, Settlement (Payment) or Receipt									$ 7,500
Accelerated Share Repurchases, Final Price Paid Per Share						$ 47.08