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Note 6 - Financial Instruments and Fair Value (Tables)
9 Months Ended
Sep. 30, 2012
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
 

At September 30, 2012

         

Fair Value Estimated Using

 

Cost Basis
Amount

Level 1
Inputs

Level 2
Inputs

Level 3
Inputs

Investment in auction rate securities

  $ 7,575  

 

  $ 6,628
 

At December 31, 2011

         

Fair Value Estimated Using

 

Cost Basis
Amount

Level 1
Inputs

Level 2
Inputs

Level 3
Inputs

Investment in auction rate securities

  $ 7,575  

 

  $ 6,628
Schedule of Derivative Instruments [Table Text Block]

 

Agreement

 

Notional Amount

 

Fixed Interest Rate

 

 

Underlying

Rate

 

 

Expiration Date

 

 

Fair Value

Interest Rate Swap

 

$ 2,074

 

5.075%

 

3 month LIBOR

 

July 1, 2015

 

$ (100)

Interest Rate Swap

 

4,284

 

5.075%

 

3 month LIBOR

 

July 1, 2015

 

   (205)

Interest Rate Swap

 

7,444

 

5.39%

 

1 month LIBOR

 

December 31, 2014

 

(326)

Interest Rate Swap

 

1,439

 

5.39%

 

1 month LIBOR

 

December 31, 2014

 

   (63)

Interest Rate Swap

 

2,561

 

5.39%

 

1 month LIBOR

 

December 31, 2014

 

   (112)

Interest Rate Swap

 

5,796

 

5.39%

 

1 month LIBOR

 

December 31, 2014

 

(254)

Interest Rate Swap

 

5,304

 

5.38%

 

1 month LIBOR

 

June 29, 2015

 

(304)

Interest Rate Swap

 

       816

 

5.29%

 

1 month LIBOR

 

June 30, 2015

 

   (47)

Interest Rate Swap

 

1,564

 

5.29%

 

1 month LIBOR

 

June 30, 2015

 

(89)

Interest Rate Swap

 

7,888

 

5.29%

 

1 month LIBOR

 

June 30, 2015

 

(448)

Interest Rate Swap

 

     680

 

5.29%

 

1 month LIBOR

 

June 30, 2015

 

   (39)

Interest Rate Swap

 

2,734

 

5.29%

 

1 month LIBOR

 

June 30, 2015

 

(155)

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]
   

Fair Value at

Derivative Liabilities Designated as Hedging Instruments

Balance Sheet Location

September 30, 2012

December 31, 2011

Interest Rate Swaps

Other Long-Term Liabilities

  $ 2,142   $ 2,233