Income Taxes (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Components of the deferred tax assets and deferred tax liabilities
Income tax benefit or expense	$ 0	$ 2,478,000
Net deferred tax assets	0		0
Net deferred tax liabilities	0		0
Unrecognized tax benefits	0		0
Mexico
Components of the deferred tax assets and deferred tax liabilities
Income tax benefit or expense		$ 2,500,000