Changes in Operations Canada (Details)	12 Months Ended			1 Months Ended	3 Months Ended	12 Months Ended		1 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Jun. 30, 2009 HCRY [Member] USD ($)	Sep. 30, 2011 HCRY [Member] USD ($)	Dec. 31, 2012 HCRY [Member] USD ($)	Dec. 31, 2012 HCRY [Member] CAD	Aug. 31, 2012 TSMC [Member] km
Business Acquisition [Line Items]
Track kilometers to be constructed								21
HCRY impairment and restructuring charges, net of tax				$ 5,400,000
HCRY loss on write-down				6,700,000
Restructuring charges	0	0	(2,349,000)	2,300,000
Income Tax Expense (Benefit)				(3,600,000)
Amounts pledged by the governments						30,000,000	30,000,000
Expected payments for capital improvements						3,000,000	3,000,000
Reversal of accrued restructuring charges					2,300,000
Reversal of accrued restructuring charges after tax					$ 1,500,000