Note 2 - Summary of Significant Accounting Policies (Details) - Reclassified Balance Sheet Items (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Restricted cash and cash equivalents (current assets section)	$ 11,556	$ 10,298
Restricted cash and cash equivalents (other assets section)	3,631	3,631
Restricted marketable securities (current assets section)	12,517	14,027
Restricted marketable securities (other assets section)	134,701	127,976
Accounts receivable (current assets section)	80,842	79,856
Deposits and other assets (other assets section)	6,740	6,808
Accrued risk reserves (current liability section)	24,073	24,325
Accrued risk reserves (non-current liability section)	87,719	86,232
Deferred income taxes (other assets section)	21,000	18,164
Deferred income taxes (current liabilities section)	29,337	24,790
Scenario, Previously Reported [Member]
Restricted cash and cash equivalents (current assets section)		13,929
Restricted marketable securities (current assets section)		142,003
Accounts receivable (current assets section)		85,511
Deposits and other assets (other assets section)		1,153
Accrued risk reserves (current liability section)		110,557
Deferred income taxes (other assets section)		14,531
Deferred income taxes (current liabilities section)		21,157
Restatement Adjustment [Member]
Restricted cash and cash equivalents (current assets section)		(3,631)
Restricted cash and cash equivalents (other assets section)		3,631
Restricted marketable securities (current assets section)		(127,976)
Restricted marketable securities (other assets section)		127,976
Accounts receivable (current assets section)		(5,655)
Deposits and other assets (other assets section)		5,655
Accrued risk reserves (current liability section)		(86,232)
Accrued risk reserves (non-current liability section)		86,232
Deferred income taxes (other assets section)		3,633
Deferred income taxes (current liabilities section)		$ 3,633