Leases (Future Minimum Rental Payments For Operating Leases) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Summary of future minimum rental payments for operating leases [Abstract]
2014	$ 19,365
2015	22,430
2016	18,802
2017	18,802
2018	17,713
Thereafter	20,769
Total Future Minimum Payments	117,881
Vessels [Member]
Summary of future minimum rental payments for operating leases [Abstract]
2014	18,071
2015	18,071
2016	18,071
2017	18,071
2018	17,307
Thereafter	20,769
Total Future Minimum Payments	110,360
Other Leases [Member]
Summary of future minimum rental payments for operating leases [Abstract]
2014	1,294
2015	4,359
2016	731
2017	731
2018	406
Thereafter	0
Total Future Minimum Payments	$ 7,521