Note 11 - Fair Value of Financial Instruments (Detail) - Fair Value Measurements, Not Recorded (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Carrying Value [Member] | Fair Value, Inputs, Level 1 [Member]
Long Term Debt	$ 5,125	$ 5,880
Carrying Value [Member] | Fair Value, Inputs, Level 2 [Member]
Long Term Debt	235,179	236,759
Carrying Value [Member]
Long Term Debt	240,304	242,639
Fair Value, Inputs, Level 1 [Member] | Industrial Revenue Bond [Member]
Long Term Debt	5,125	5,880
Fair Value, Inputs, Level 2 [Member] | Term Loan [Member]
Long Term Debt	57,604	66,354
Fair Value, Inputs, Level 2 [Member] | Revolver [Member]
Long Term Debt	177,575	170,405
Industrial Revenue Bond [Member]
Long Term Debt	5,125	5,880
Term Loan [Member]
Long Term Debt	57,604	66,354
Revolver [Member]
Long Term Debt	$ 177,575	$ 170,405