Note 1 - Description of Business (Details) - Business Acquisitions - Contributions to Revenues and Profits Since Acquisitions (Brinderson LP [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013
Brinderson LP [Member]
Note 1 - General - Business Acquisitions - Contributions to Revenues and Profits Since Acquisitions [Line Items]
Revenues	$ 305,807		$ 108,233
Net income	$ 13,310	[1]	$ 4,838	[1]

[1] Net income includes an allocation of corporate expenses that is not necessarily an indication of the entity’s operations on a stand alone basis.