Note 11 - Purchase of Interests in Subsidiaries (Detail) - Pro Forma Information (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
2013 consolidated from January 1 to March 31, 2013	$ 44	$ 307
Consolidated From Jan 1 to Mar 31, 2013 [Member] | BIP [Member]
2013 consolidated from January 1 to March 31, 2013	26,177
2013 consolidated from January 1 to March 31, 2013	44
Supplemental Pro Forma From Jan 1 to Mar 31, 2012 [Member] | BIP [Member]
2012 Supplemental pro forma from January 1 to March 31, 2012		22,316
2012 Supplemental pro forma from January 1 to March 31, 2012		282
BIP [Member]
Actual BIP from January 1 to March 31, 2013	1,187
Actual BIP from January 1 to March 31, 2013	$ 20