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Lease Commitments (Tables)
 12 Months Ended
Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]  
Future minimum lease payments under noncancelable operating leases
Future minimum lease payments under noncancelable operating leases (both gross and net of any sublease income), including the amended lease for our principal executive offices, are as follows (in thousands):
Year Ending December 31,
 
Gross
 
Sublease Income
 
Net
2015
 
$
4,186

 
$
(49
)
 
$
4,137

2016
 
3,305

 
(32
)
 
3,273

2017
 
2,494

 
(16
)
 
2,478

2018
 
1,638

 
—

 
1,638

2019
 
1,583

 
—

 
1,583

Thereafter
 
3,271

 
—

 
3,271

Total payments
 
$
16,477

 
$
(97
)
 
$
16,380