Note 9 - Debt (Detail) (USD $) In Thousands, unless otherwise specified	1 Months Ended	0 Months Ended	12 Months Ended
	Jun. 30, 2012	Mar. 16, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Line of Credit Facility, Increase, Additional Borrowings		$ 50,000	$ (535,360)	$ (576,474)	$ (323,094)
Line of Credit Facility, Maximum Borrowing Capacity		315,000
Long-term Debt, Gross			254,162	165,021	29,660
Line of Credit Facility, Current Borrowing Capacity			315,000
Line of Credit Facility, Amount Outstanding	53,229
Term Loan Outstanding			34,562
Line of Credit Facility, Remaining Borrowing Capacity			62,925
Description of Interest Rate Cash Flow Hedge Activities	1.21%
Prepaid Expense and Other Assets, Current			11,731	13,112
Debt Instrument, Fee Amount			1,212
Amortization of Financing Costs			1,296	684	569
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred			5,880	5,880
Debt Instrument, Interest Rate at Period End			0.25%
Interest Rate Swap Agreement			3.46%
Debt Instrument, Interest Rate, Effective Percentage			2.70%	3.10%	3.90%
Interest Paid			7,295	5,081	1,672
Availability Dollar Amount [Member]
Line Of Credit Facility Covenant Terms Monetary			20,000
Percentage of Commitments [Member]
Line of Credit Facility, Covenant Terms			12.5%
Agent Base Rate Plus Premium [Member] | Maximum [Member] | Term Loan [Member]
Line of Credit Facility, Interest Rate Description			0.75%
Agent Base Rate Plus Premium [Member] | Maximum [Member]
Line of Credit Facility, Interest Rate Description			0.50%
Debt Instrument, Basis Spread on Variable Rate			0.75%
Agent Base Rate Plus Premium [Member] | Minimum [Member] | Term Loan [Member]
Line of Credit Facility, Interest Rate Description			0.25%
Agent Base Rate Plus Premium [Member] | Minimum [Member]
Line of Credit Facility, Interest Rate Description			0.00%
Debt Instrument, Basis Spread on Variable Rate			0.25%
LIBOR Rate [Member] | Maximum [Member] | Term Loan [Member]
Line of Credit Facility, Interest Rate Description			2.25%
LIBOR Rate [Member] | Maximum [Member]
Line of Credit Facility, Interest Rate Description			2.00%
Debt Instrument, Basis Spread on Variable Rate			2.25%
LIBOR Rate [Member] | Minimum [Member] | Term Loan [Member]
Line of Credit Facility, Interest Rate Description			1.75%
LIBOR Rate [Member] | Minimum [Member]
Line of Credit Facility, Interest Rate Description			1.50%
Debt Instrument, Basis Spread on Variable Rate			1.75%
Maximum [Member]
Line of Credit Facility, Covenant Terms			1.10
Description of Interest Rate Cash Flow Hedge Activities	2.25%
Minimum [Member]
Line of Credit Facility, Covenant Terms			1.00
Description of Interest Rate Cash Flow Hedge Activities	1.75%
Monthly [Member]
Debt Instrument, Payment Terms			$729
Amortized Banking Fees [Member]
Prepaid Expense and Other Assets, Current			4,690
Term Loan [Member] | ABL Credit Facility [Member]
Other Long-term Debt			70,000
Term Loan [Member]
Other Long-term Debt		64,167
Long-term Debt, Gross			57,604
Industrial Revenue Bonds [Member]
Long-term Debt, Gross			5,125
ABL Credit Facility [Member]
Line of Credit Facility, Amount Outstanding			$ 39,375
Percentage of Balance of Term Loan Outstanding [Member]
Line of Credit Facility, Covenant Terms			60%