Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Accounting Policies [Abstract]

Supplemental Cash Flow Information

The following table sets forth non-cash financing and investing activities and other cash flow information for the years ended:

Non-cash financing and investing activities:	2012		2011		2010
Capital expenditures(1)	$	3,402	$	2,936	$	(2,589	)
Capital lease obligations	1,857		4,510		23,437
Non-cash capitalized interest	845		681		3,778
Non-cash interest paid with stock	—		—		1,756
Non-cash Joaquin acquisition and related deferred taxes	64,133		—		—
Other cash flow information:
Interest paid	6,092		11,033		12,676
Capitalized interest	2,663		2,175		9,885
Income taxes paid	54,680		44,396		9,998

(1) Accrued capital expenditures are recognized in the consolidated statements of cash flows in the period in which they are paid.