Debt (Tables)

12 Months Ended

Dec. 31, 2012

Debt Disclosure [Abstract]

Outstanding Debt Balances

Outstanding debt balances were as follows:

	December 31,
	2012		2011
Notes payable – current:
Uncommitted lines of credit	$	33,916	$	21,572
Other	296		150
	$	34,212	$	21,722
Long-term debt:
Credit facility	$	300,000	$	291,000
Senior notes	300,000		300,000
Industrial development revenue bonds	11,900		11,900
Other	5,634		3,254
	$	617,534	$	606,154