Other Financial Statement Disclosures (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Material Charges and Other Operating Expenses [Abstract]
Redomestication expenses	$ 1,895		$ 11,696
Repair costs for EXL I	8,855		8,855
Pension settlement loss	5,126		5,126
Share-based compensation for retiring employee	2,298		2,298
Steel impairment costs	0	0	2,896
Total material charges and other operating expenses	$ 18,174		$ 30,871