Note 17 - Quarterly Results of Operations (Unaudited) (Details) - Quarterly Results of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Quarterly Results of Operations [Abstract]
Total revenue	$ 176,487		$ 170,843		$ 172,488		$ 164,731		$ 177,495		$ 168,427		$ 171,301		$ 157,031	[1]	$ 684,549	$ 674,254	$ 652,627
Operating income (1)	8,877	[2]	5,882	[2]	6,350	[2]	(715)	[2]	5,149	[2]	4,645	[2]	11,059	[2]	2,357	[1],[2]	20,394	23,209	(1,061)
Net income (loss) (1)	$ 3,339	[2]	$ 1,973	[2]	$ 1,891	[2]	$ (1,959)	[2]	$ 1,452	[2]	$ 1,002	[2]	$ 4,251	[2]	$ (640)	[1],[2]	$ 5,244	$ 6,065	$ (14,267)
Basic and diluted income (loss) per share (in Dollars per share)	$ 0.22		$ 0.13		$ 0.13		$ (0.13)		$ 0.10		$ 0.07		$ 0.29		$ (0.04)	[1]

[1] Includes $2.4 million gain on the sale of a terminal property.

[2] Quarter totals do not aggregate to annual results due to rounding.