Debt (Tables)

12 Months Ended

Dec. 31, 2011

Debt Disclosure [Abstract]

Outstanding Debt Balances

Outstanding debt balances were as follows:

	December 31,
	2011		2010
Notes payable – current:
Uncommitted lines of credit	$	21,572	$	15,038
Other	150		—
	$	21,722	$	15,038
Long-term debt:
Credit facility	$	291,000	$	235,000
Senior notes	300,000		300,000
Industrial development revenue bonds	11,900		11,900
Other	3,254		3,468
	$	606,154	$	550,368