Note 7 - Accounting for Share-based Payment Arrangement Compensation	6 Months Ended
	Jun. 30, 2016
Notes to Financial Statements
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	(7) Accounting for Share-based Payment Arrangement Compensation We account for share-based payment arrangements in accordance with Financial Accounting Standards Board Accounting Standards Codification, or FASB ASC , 718, Compensation – Stock Compensation . During the first six months of 2016, there were no significant changes to the structure of our stock-based award plans. Pre-tax compensation expense related to stock options and performance unit awards recorded in the first six months of 2016 and 2015 was $668,000 and $856,000, respectively . See Note 13 to our consolidated financial statements in our 2015 Annual Report on Form 10-K for a detailed description of stock-based awards .

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.