Leases (Details 1) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011
Future minimum lease payments under all non-cancelable leases
2012	$ 14,389
2013	11,012
2014	8,611
2015	7,228
2016	4,432
Thereafter	16,231
Total minimum lease payments	61,903
2012	1,583
2013	685
2014	649
2015	587
2016	278
Thereafter	2,927
Total minimum lease payments	6,709
Less amount representing executory costs	33
Net minimum lease payments	6,676
Less amount representing imputed interest	2,217
Present value of net minimum lease payments	4,459
Less current portion	1,241
Long-term obligations at December 31, 2011	$ 3,218

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid within one year (or one operating cycle, if longer) of the balance sheet date.