Segment Information (Schedule of Long-Lived Assets, by Geographical Areas) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014 segment item	Dec. 31, 2013
Segment Reporting Information [Line Items]
Number of Co-CEOs	2
Number of reporting segments	1
Number of geographic areas	4
Long Lived Assets	$ 156,478	$ 158,264
United States [Member]
Segment Reporting Information [Line Items]
Long Lived Assets	55,567	55,809
Canada [Member]
Segment Reporting Information [Line Items]
Long Lived Assets	65,472	67,858
Europe [Member]
Segment Reporting Information [Line Items]
Long Lived Assets	34,410	33,793
International Waters [Member]
Segment Reporting Information [Line Items]
Long Lived Assets	1,029	804
Aruba [Member]
Segment Reporting Information [Line Items]
Long Lived Assets	0	0
International [Member]
Segment Reporting Information [Line Items]
Long Lived Assets	$ 100,911	$ 102,455