v2.4.0.6

Lease Commitments (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Leases [Abstract]
Rental expense under operating leases	$ 8,817	$ 8,481	$ 7,221
Future minimum lease payments for non-cancelable operating leases
2012	6,841
2013	6,256
2014	4,835
2015	3,619
2016	2,537
Thereafter	10,933
Future minimum lease payments	$ 35,021

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The total of future contractually required payments on leases defined as operating.

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within one year of the balance sheet date relating to leases defined as operating.

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the third year of the balance sheet date relating to leases defined as operating.

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Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

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