Commitments, Contingencies and Guarantees (Tables)

12 Months Ended

Dec. 31, 2011

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

Leases: Minimum rental commitments and minimum royalty requirements under all noncancellable operating leases, primarily quarry property, in effect at December 31, 2011 were (in thousands):

Years Ending December 31,
2012	$	5,836
2013	4,999
2014	4,744
2015	3,724
2016	3,293
Later years (through 2099)	13,538
Total	$	36,134