Segment Information (Schedule of Revenue from External Customers Long-Lived Assets, by Geographical Areas) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting Information [Line Items]
Net Operating Revenue	$ 28,123	$ 28,826	$ 88,790	$ 75,164
United States [Member]
Segment Reporting Information [Line Items]
Net Operating Revenue	7,252	7,870	20,456	22,790
Canada [Member]
Segment Reporting Information [Line Items]
Net Operating Revenue	8,264	8,023	25,533	25,148
Europe [Member]
Segment Reporting Information [Line Items]
Net Operating Revenue	10,425	11,115	37,087	21,985
International Waters [Member]
Segment Reporting Information [Line Items]
Net Operating Revenue	2,094	1,731	5,441	4,968
Aruba [Member]
Segment Reporting Information [Line Items]
Net Operating Revenue	88	87	273	273
International [Member]
Segment Reporting Information [Line Items]
Net Operating Revenue	$ 20,871	$ 20,956	$ 68,334	$ 52,374