Income Taxes (Deferred Tax Assets and Liabilities by Balance Sheet Classification (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred Tax Assets and Liabilities by Balance Sheet Classification [Abstract]
Deferred tax assets - current	$ 48,470	$ 36,846
Deferred tax liabilities - current	(364)	(876)
Deferred tax assets- non current	115,418	43,097
Deferred tax liabilities - non current	(13,127)	(19,756)
Total net deferred tax assets	$ 150,397	$ 59,311