Segment Information (Schedule of Revenue from External Customers Long-Lived Assets, by Geographical Areas) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Segment Reporting Information [Line Items]
Net Operating Revenue	$ 28,348	$ 17,791	$ 46,337	$ 35,360
United States [Member]
Segment Reporting Information [Line Items]
Net Operating Revenue	7,578	7,731	14,916	15,119
Canada [Member]
Segment Reporting Information [Line Items]
Net Operating Revenue	8,318	8,404	17,127	16,947
Europe [Member]
Segment Reporting Information [Line Items]
Net Operating Revenue	10,870	0	10,870	0
International Waters [Member]
Segment Reporting Information [Line Items]
Net Operating Revenue	1,488	1,578	3,237	3,138
Aruba [Member]
Segment Reporting Information [Line Items]
Net Operating Revenue	94	78	187	156
International [Member]
Segment Reporting Information [Line Items]
Net Operating Revenue	$ 20,770	$ 10,060	$ 31,421	$ 20,241