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Note 16 - Share-based Compensation (Tables)
6 Months Ended
Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
 
Number
of Shares
(in thousands)
 
Weighted-
Average
Exercise
Price
 
Weighted-
Average
Remaining
Contractual
Term in
Years
 
Aggregate
Intrinsic
Value
(in thousands)
Options Outstanding as of December 31, 2014
48,724
 
$18.94
       
Granted
  1,572
 
  21.49
       
Exercised
  (5,994)
 
  16.36
       
Forfeited and Expired
     (135)
 
  17.10
       
Options Outstanding as of June 30, 2015
44,167
 
  19.39
 
4.37
 
$134,198
Options Expected to Vest as of June 30, 2015
44,103
 
  19.39
 
4.36
 
  134,060
Options Exercisable as of June 30, 2015
36,560
 
  19.85
 
3.52
 
  105,383
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
 
Three months ended June 30,
 
Six months ended June 30,
 
2015
 
2014
 
2015
 
2014
Expected volatility
44.5
-
44.5%
 
45.8
-
45.8%
 
44.5
-
44.9%
 
45.8
-
46.2%
Weighted-average volatility
44.5
-
44.5%
 
45.8
-
45.8%
 
44.5
-
44.9%
 
45.8
-
46.2%
Expected dividends
2.24
-
2.24%
 
1.90
-
1.90%
 
1.92
-
2.24%
 
1.90
-
2.09%
Risk-free rate
1.9
-
1.9%
 
2.2
-
2.2%
 
1.9
-
1.9%
 
2.2
-
2.2%
Average risk-free rate
1.9
-
1.9%
 
2.2
-
2.2%
 
1.9
-
1.9%
 
2.2
-
2.2%
Expected term (in years)
7.2
-
7.2
 
7.2
-
7.2
 
7.2
-
7.2
 
7.2
-
7.2
Pre-vesting departure rate
0.6
-
0.6%
 
0.5
-
0.5%
 
0.6
-
0.6%
 
0.5
-
0.5%
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]
 
Shares
(000’s)
 
Weighted
Average
Grant-Date
Fair Value
Non-vested shares and share units at December 31, 2014
5,737 
 
$
15.43
Granted
1,329 
   
22.60
Vested
(1,656)
   
13.73
Forfeited
(9)
   
22.68
Non-vested shares and share units at June 30, 2015
5,401 
 
$
17.70