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Lease Commitments
12 Months Ended
Dec. 31, 2014
Leases [Abstract]  
Leases of Lessee Disclosure
Lease Commitments
The Company incurred $11,375, $10,581, and $9,980 of rental expense under operating leases for the years ended December 31, 2014, 2013 and 2012, 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, 2014:
2015
$
10,900

2016
7,500

2017
6,900

2018
5,100

2019
4,200

Thereafter
9,900

Total future minimum lease payments
$
44,500