XML 151 R41.htm IDEA: XBRL DOCUMENT

Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2011

Commitments and Contingencies [Abstract]


in thousands	Unconditional Purchase Obligations

Property, Plant & Equipment
2012		$3,745
Thereafter		0
Total		$3,745

Noncapital
2012		$18,907
2013–2014		19,790
2015–2016		7,497
Thereafter		21,338
Total		$67,532

Minimum royalties under mineral leases


in thousands	Mineral Leases

Mineral Royalties
2012		$19,598
2013–2014		39,182
2015–2016		29,090
Thereafter		127,173
Total		$215,043

Standby Letters of Credit



in thousands

Standby Letters of Credit
Risk management requirement for insurance claims			$41,083
Payment surety required by utilities			133
Contractual reclamation/restoration requirements			8,186
Financing requirement for industrial revenue bond			14,230
Total			$63,632

- Definition

Tabular disclosure of unconditional purchase obligations that are recognized as a liability on the balance sheet, including the nature and term of the unconditional purchase obligations; the aggregate amount of payments for each of the five years following the date of the latest balance sheet; and the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings associated with suppliers' financing arrangements.

+ References+ Details