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Commitments (Tables)
12 Months Ended
Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Future Minimum Rental Commitments under Non-cancelable Operating Leases
We lease certain of our premises and equipment under non-cancelable operating leases with terms expiring through 2020 exclusive of renewal option periods. Our annual aggregate minimum rental commitments under these leases are summarized as follows:
2016
$
18,293

2017
13,203

2018
6,409

2019
3,377

2020
990

Thereafter

 
42,272

Less: Sublease income
(1,656
)
Total minimum lease payments, net
$
40,616