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Lease Commitments
12 Months Ended
Dec. 31, 2013
Leases [Abstract]  
Leases of Lessee Disclosure
Lease Commitments
The Company incurred $10,581, $9,980, and $8,817 of rental expense under operating leases for the years ended December 31, 2013, 2012 and 2011, respectively. Certain leases contain rent escalation clauses and lease concessions that require additional rental payments in the later years of the term. Rent expense for these types of leases is recognized on a straight-line basis over the minimum lease term. In addition, the Company has the right, but no obligation, to renew certain leases for various renewal terms.
The following table summarizes the future minimum lease payments for non-cancelable operating leases as of December 31, 2013:
2014
$
10,195

2015
6,700

2016
5,011

2017
4,181

2018
3,146

Thereafter
9,183

Total future minimum lease payments
$
38,416