Note 5 - Long-Term Debt and Credit Facility (Details) - Debt Instruments Table (USD $)	Dec. 31, 2013	Jul. 02, 2013	Dec. 31, 2012
Long-term debt, term note and notes payable:
Original term note, due August 31, 2016			$ 218,750,000
Line of credit, 2.17% in 2013 and 2.49% in 2012		35,500,000
Other notes with interest rates from 3.3% to 6.5%	11,890,000		10,873,000
Subtotal	388,640,000		255,623,000
Less – Current maturities and notes payable	22,024,000		33,775,000
Total	366,616,000		221,848,000
Principal payments in next five years:
2014	22,024,000
2015	31,131,000
2016	30,625,000
2017	40,500,000
2018	264,360,000
Total	366,616,000		221,848,000
2013 Credit Facility [Member]
Long-term debt, term note and notes payable:
Term note, current annualized rate 2.21% due July 1, 2018	341,250,000	350,000,000
Line of credit, 2.17% in 2013 and 2.49% in 2012	35,500,000
2011 Credit Facility [Member]
Long-term debt, term note and notes payable:
Line of credit, 2.17% in 2013 and 2.49% in 2012			$ 26,000,000