Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair value on a Recurring Basis (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair value on a Recurring Basis [Line Items]
Fair Value	$ 1,079,381	$ 825,636
Fair Value, Inputs, Level 1 [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair value on a Recurring Basis [Line Items]
Fair Value	148,670	57,424
Fair Value, Inputs, Level 2 [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair value on a Recurring Basis [Line Items]
Fair Value	$ 930,711	$ 768,212