Segment Information (Tables)

9 Months Ended

Sep. 30, 2012

Segment Information [Abstract]

Schedule of Long-Lived Assets, by Geographical Areas

	Long Lived Assets
	At September 30,	At December 31,
Amounts in thousands	2012	2011
United States	$ 55,513	$ 56,294
International:
Canada	$ 50,435	$ 48,423
Europe	3,858	3,228
International waters	1,252	1,496
Total international	55,545	53,147
Total	$ 111,058	$ 109,441

Schedule of Revenue from External Customers, by Geographical Areas

	Net Operating Revenue		Net Operating Revenue
	For the three months		For the nine months
	ended September 30,		ended September 30,
Amounts in thousands	2012	2011	2012	2011
United States	$ 8,434	$ 8,257	$ 23,553	$ 23,227
International:
Canada	$ 8,428	$ 8,301	$ 25,371	$ 25,294
International waters	1,778	1,508	4,919	4,440
Aruba	83	80	239	302
Total international	10,289	9,889	30,529	30,036
Total	$ 18,723	$ 18,146	$ 54,082	$ 53,263