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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Future Minimum Rental Payments for Operating Leases
At December 31, 2012, the approximate minimum future commitments payable under non-cancelable contracts for leased premises are as follows:
(in thousands)
2013

2014

2015

2016

2017

Thereafter

Total

Operating leases
$
2,911

$
2,806

$
2,881

$
2,964

$
2,986

$
12,109

$
26,657