Note 3 - Acquisitions (Details) (USD $)	3 Months Ended		6 Months Ended		72 Months Ended	73 Months Ended	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended		3 Months Ended		6 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014 Selling, General and Administrative Expenses [Member] Acquisitions 2013 [Member]	Jun. 30, 2013 Selling, General and Administrative Expenses [Member] Acquisitions 2013 [Member]	Jun. 30, 2014 Selling, General and Administrative Expenses [Member] Acquisitions 2013 [Member]	Jun. 30, 2013 Selling, General and Administrative Expenses [Member] Acquisitions 2013 [Member]	Jun. 30, 2014 Selling, General and Administrative Expenses [Member] 2014 Acquisitions [Member]	Jun. 30, 2013 Selling, General and Administrative Expenses [Member] 2014 Acquisitions [Member]	Jun. 30, 2014 Selling, General and Administrative Expenses [Member] 2014 Acquisitions [Member]	Jun. 30, 2013 Selling, General and Administrative Expenses [Member] 2014 Acquisitions [Member]	Dec. 31, 2013 Acquisitions 2013 [Member]	Dec. 31, 2013 Other 2011 Acquisitions [Member]	Jun. 30, 2014 2014 Acquisitions [Member]	Jun. 30, 2013 2014 Acquisitions [Member]	Jun. 30, 2014 2014 Acquisitions [Member]	Jun. 30, 2014 Pro Forma Additional Expenses [Member]	Jun. 30, 2013 Pro Forma Additional Expenses [Member]	Jun. 30, 2014 Pro Forma Additional Expenses [Member]	Jun. 30, 2013 Pro Forma Additional Expenses [Member]
Note 3 - Acquisitions (Details) [Line Items]
Number of Businesses Acquired					48	48
Business Combination, Consideration Transferred															$ 7,300,000				$ 193,198,000
Payments to Acquire Businesses, Gross															3,300,000				187,400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents																8,000	1,100,000		1,100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities															4,000,000		6,900,000		6,900,000
Business Acquisition, Transaction Costs															108,000		1,500,000		1,500,000
Business Combination, Acquisition Related Costs	762,000	458,000	1,954,000	907,000			0	0	25,000	25,000	186,000	167,000	916,000	167,000
Business Acquisition, Goodwill, Expected Tax Deductible Amount	2,700,000		2,700,000		2,700,000	2,700,000												114,800,000
Business Acquisition Purchase Price Allocation Intangible Assets Expected Tax Deductible Amount	3,900,000		3,900,000		3,900,000	3,900,000												35,900,000
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual																	21,800,000	13,300,000
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual																	183,000	(525,000)
Interest Expense	580,000	502,000	1,200,000	1,100,000																489,000	789,000	56,000	1,500,000
Depreciation, Depletion and Amortization			29,200,000	32,148,000																960,000	4,300,000	3,200,000	8,600,000
Selling, General and Administrative Expense	$ 42,590,000	$ 34,076,000	$ 83,118,000	$ 67,333,000																$ 1,500,000	$ 1,600,000	$ 5,500,000	$ 3,000,000