Note 5 - Long-Term Debt and Credit Facility (Detail) (USD $)	1 Months Ended			12 Months Ended
	Sep. 30, 2011	Aug. 31, 2011	Jun. 30, 2011	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Jun. 30, 2014	Sep. 06, 2011	Mar. 31, 2011	Mar. 30, 2011
Long-term Debt, Fair Value				$ 245,100,000	$ 106,000,000
Debt Instrument, Face Amount									50,000,000
Line of Credit Facility, Maximum Borrowing Capacity		250,000,000							65,000,000
Business Combination, Consideration Transferred		115,800,000		163,133,000
Repayments of Long-term Debt		52,500,000		103,750,000	10,000,000	7,500,000
Early Repayment of Senior Debt	65,000,000	65,000,000
Debt Instrument, Interest Rate, Stated Percentage		6.54%						6.54%
Make Whole Payment		5,700,000						5,700,000
Payments of Debt Issuance Costs		4,100,000
Debt Instrument, Interest Rate at Period End		2.83%
Notional Amount of Interest Rate Derivatives		83,000,000		83,000,000
Derivative, Amount of Hedged Item		83,000,000
Derivative, Basis Spread on Variable Rate				0.89%
Derivative, Variable Interest Rate				2.55%
Line of Credit Facility, Ability to Increase Borrowing Commitment									40,000,000	25,000,000
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net				100,000
Line of Credit Facility, Increase, Additional Borrowings			25,000,000
Write off of Deferred Debt Issuance Cost		1,100,000
Senior Notes					65,000,000			65,000,000
Unsecured Debt				243,750,000	32,500,000
Other Loans Payable				1,500,000	3,000,000
Due from Joint Ventures				8,000,000
Other Long-term Debt				4,100,000	4,200,000
Letters of Credit Outstanding, Amount				18,200,000
Credit Facility Maximum Consolidated Leverage Ratio				3.00			2.25
Credit Facility, Consolidated Leverage Ratio				2.42
Line of Credit Facility, Remaining Borrowing Capacity				61,000,000
Credit Facility Minimum Consolidated Fixed Charge Ratio				1.25
CreditFacilityFixed ChargeRatio				2.08
Minimum Net Worth Required for Compliance				501,800,000
Credit Facility, Net Worth				640,700,000
Net Worth Calculation One [Member]
Debt Instrument, Covenant Description				80%
Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate		1.50%
Credit Facility [Member]
Debt Instrument, Face Amount		500,000,000
Term Loan [Member]
Debt Instrument, Face Amount		250,000,000
Insurance Carriers Collateral [Member]
Letters of Credit Outstanding, Amount				12,500,000
Payment Obligations of Foreign Subsidiaries [Member]
Letters of Credit Outstanding, Amount				$ 5,700,000
Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate		2.50%
Net Worth Calculation Two [Member]
Debt Instrument, Covenant Description				50%
Net Worth Calculation Three [Member]
Debt Instrument, Covenant Description				100%