Other Assets (Tables)

12 Months Ended

Dec. 31, 2011

Other Assets [Abstract]

Summary Of Non-Current Other Assets

	2011		2010
Real Estate	$	173,077	$	168,001
Unamortized debt expense		11,454		16,125
Restricted cash		67,396		94,684
Prepaid mining interest		139,572		153,210
Other		28,658		20,301
	$	420,157	$	452,321