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Note 6 - Stockholders Equity and Equity Compensation (Detail) - Summary of Stock Award Activity (USD $)
3 Months Ended
Mar. 31, 2012
Restricted Stock [Member]
 
Stock Awards - Outstanding 643,117
Weighted Average Award Date Fair Value - Outstanding (in Dollars per share) $ 17.44
Stock Awards - Awarded 251,054
Weighted Average Award Date Fair Value - Awarded (in Dollars per share) $ 18.11
Stock Awards - Distributed (258,242)
Weighted Average Award Date Fair Value - Distributed (in Dollars per share) $ 12.84
Stock Awards - Forfeited (7,825)
Weighted Average Award Date Fair Value - Forfeited (in Dollars per share) $ 20.78
Stock Awards - Outstanding 805,126
Weighted Average Award Date Fair Value - Outstanding (in Dollars per share) $ 19.32
Restricted Stock Units (RSUs) [Member]
 
Stock Awards - Awarded 188,958 [1]
Weighted Average Award Date Fair Value - Awarded (in Dollars per share) $ 18.11 [1]
Stock Awards - Distributed (11,936)
Weighted Average Award Date Fair Value - Distributed (in Dollars per share) $ 12.84
[1] The Company assumed the issuance of shares pursuant to restricted stock unit awards were issued at the target level.