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Note 8 - Employee Benefit Plan (Details) - Defined Benefit Plan Activity (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Change in plan assets      
Fair value of plan assets at beginning of year $ 14,325    
Fair value of plan assets at end of year 16,605 14,325  
Other changes in plan assets and benefit obligations recognized in other comprehensive loss      
Net (gain) loss (1,898) 752 1,356
Amortization of prior service cost 66 66 66
Pension Benefits [Member]
      
Change in benefit obligation      
Projected benefit obligation at beginning of year 18,054 15,808 12,971
Service cost 596 468 435
Interest cost 617 738 704
Actuarial (gain) loss (1,149) 1,554 2,001
Benefits paid (933) (514) (303)
Projected benefit obligation at end of year 17,185 18,054 15,808
Change in plan assets      
Fair value of plan assets at beginning of year 14,325 13,326 8,156
Actual return on plan assets 2,225 963 432
Employer contribution 988 550 5,041
Benefits paid (933) (514) (303)
Fair value of plan assets at end of year 16,605 14,325 13,326
Funded status at the end of the year (580) (3,729) (2,482)
Amounts recognized in the Consolidated Balance Sheet      
Deferred tax asset 203 1,305 869
Other liabilities (580) (3,729) (2,482)
Total amounts recognized in the Consolidated Balance Sheet (377) (2,424) (1,613)
Amounts recognized in accumulated other comprehensive (loss), net      
Net loss (5,282) (8,202) (7,044)
Prior service cost 779 879 979
Deferred tax asset 1,550 2,538 2,098
Amount recognized (2,953) (4,785) (3,967)
Accrued/Prepaid benefit cost, net      
Benefit obligation (17,185) (18,054) (15,808)
Fair value of assets 16,605 14,325 13,326
Unrecognized net actuarial loss 5,282 8,202 7,044
Unrecognized prior service cost (779) (879) (979)
Deferred tax liability (1,347) (1,233) (1,229)
Prepaid benefit cost included in other liabilities 2,576 2,361 2,354
Components of net periodic benefit cost      
Service cost 596 468 435
Interest cost 617 738 704
Expected return on plan assets (984) (1,075) (810)
Amortization of prior service cost (101) (101) (101)
Recognized net actuarial loss 532 508 292
Net periodic benefit cost 660 538 520
Other changes in plan assets and benefit obligations recognized in other comprehensive loss      
Net (gain) loss (2,921) 1,157 2,087
Amortization of prior service cost 101 101 101
Deferred income tax expense (benefit) 987 (440) (766)
Total recognized (1,833) 818 1,422
Total recognized in net periodic benefit cost and other comprehensive loss, net of income tax expense (benefit) $ (2,160) $ 1,796 $ 2,708
Weighted average assumptions at end of the year      
Discount rate used for net periodic pension cost 3.75% 4.50% 5.50%
Discount rate used for disclosure 4.50% 3.75% 4.50%
Expected return on plan assets 7.50% 8.00% 8.00%
Rate of compensation increase 3.00% 3.00% 3.00%