Leases (Tables)

12 Months Ended

Dec. 31, 2012

Leases [Abstract]

Future minimum lease payments required under our leasing arrangements

Future minimum lease payments required under our leasing arrangements at December 31, 2012 are approximately as follows:

	2013		2014		2015		2016		2017		Thereafter
Future minimum lease payments	$	18,600	$	16,300	$	13,800	$	10,700	$	10,200	$	12,500