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Commitments (Details 4) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Operating Leases:      
Consolidated rent expense $ 2,982 $ 3,098 $ 2,900
Future minimum payments under long-term non-cancelable operating leases      
2014 2,267    
2015 1,226    
2016 1,124    
2017 929    
2018 654    
Thereafter 1,621    
Total $ 7,821