Note 5 - Long-Term Debt and Credit Facility (Details) (USD $)	12 Months Ended				12 Months Ended					12 Months Ended
	Dec. 31, 2013	Jul. 31, 2013	Jul. 02, 2013	Dec. 31, 2012	Dec. 31, 2013 2013 Credit Facility [Member]	Jul. 31, 2013 2013 Credit Facility [Member]	Jul. 02, 2013 2013 Credit Facility [Member]	Dec. 31, 2012 2011 Credit Facility [Member]	Aug. 31, 2011 2011 Credit Facility [Member]	Dec. 31, 2013 Minimum [Member] 2013 Credit Facility [Member]	Dec. 31, 2013 Maximum [Member] 2013 Credit Facility [Member]	Dec. 31, 2013 Bayou Wasco [Member]	Dec. 31, 2013 Wasco Energy [Member]	Dec. 31, 2012 Wasco Energy [Member]	Dec. 31, 2013 Initial [Member]	Dec. 31, 2012 Initial [Member]	Dec. 31, 2013 Additional [Member]	Dec. 31, 2012 Additional [Member]	Dec. 31, 2013 BPPC [Member]	Dec. 31, 2012 BPPC [Member]	Dec. 31, 2012 Bayou Wasco [Member]	Dec. 31, 2013 Insurance Carriers Collateral [Member]	Dec. 31, 2013 Work Performance Obligations [Member]	Jul. 31, 2013 2013 Interest Rate Swap [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount							$ 650,000,000	$ 250,000,000	$ 500,000,000
Line of Credit Facility, Maximum Borrowing Capacity							300,000,000
LineOfCreditFacilityTerm			5 years
Secured Debt					341,250,000		350,000,000
Derivative, Fixed Interest Rate	0.87%	0.87%
TermLoanTerm			5 years
Debt Instrument, Maturity Date	Jul. 01, 2018
Line of Credit Facility, Amount Outstanding			35,500,000		35,500,000			26,000,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net			147,600,000
Credit Facility, Retired Amount			232,300,000
Business Combination, Consideration Paid			7,000,000
Debt Instrument, Basis Spread on Variable Rate										1.25%	2.25%
Debt Instrument, Description of Variable Rate Basis					one month LIBOR borrowing rate
Debt Instrument, Interest Rate at Period End					2.68%
Due from Joint Ventures				4,100,000								14,000,000	6,900,000	5,500,000	8,000,000	8,000,000	6,200,000	6,200,000	14,200,000	14,200,000	11,000,000
Other Long-term Debt	4,900,000			5,200,000
Other Loans Payable	100,000			100,000
Letters of Credit Outstanding, Amount	18,200,000																					10,200,000	8,000,000
Unsecured Debt				218,750,000
Long-term Debt, Fair Value	380,100,000			253,600,000
Derivative Asset, Notional Amount																								175,000,000
Derivative, Variable Interest Rate	2.17%
Derivative, Amount of Hedged Item						175,000,000
Credit Facility Maximum Consolidated Leverage Ratio	3.75
CreditFacilityMinimumConsolidatedLeverageRatio	3.5
Credit Facility Actual Consolidated Leverage Ratio	2.73
Line of Credit Facility, Remaining Borrowing Capacity	$ 145,200,000
Credit Facility Minimum Consolidated Fixed Charge Ratio	1.25
Credit Facility Actual Consolidated Fixed Charge Ratio	1.66