Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2012

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

Commitments for minimum lease payments under non-cancelable leases as of December 31, 2012 were as follows:

2013	$	3,240
2014	2,250
2015	1,729
2016	1,532
2017	1,064
Thereafter	3,931
	$	13,746

Schedule of Rent Expense

Rent expense under cancelable and non-cancelable operating leases for 2012, 2011 and 2010 was as follows:

	Year ended December 31,
	2012		2011		2010
Building rent expense	$	4,088	$	3,556	$	3,102