Note 5 - Earnings Per Common Share (Details Textual) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Common Stock, Shares Authorized	750,000,000		750,000,000		750,000,000
Common Stock, Par or Stated Value Per Share	$ 0.25		$ 0.25		$ 0.25
Common Stock, Shares, Issued	403,548,158		403,548,158
Treasury Stock, Shares	4,529,450		4,529,450		3,941,210
Common Stock, Shares, Outstanding	399,018,708		399,018,708		395,286,875
Earnings Per Share, Basic	$ 0	$ 0.07	$ 0.01	$ 0.13
Earnings Per Share, Diluted	$ 0	$ 0.07	$ 0.01	$ 0.13
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	0	0	0	0
Class of Warrant or Right, Outstanding	0	0	0	0
Restricted Stock Units (RSUs) [Member]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	3,591,697	4,309,440	3,591,697	4,309,440
Deferred Shares [Member]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	1,509,159	635,602	1,509,159	635,602