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Leases (Tables)
12 Months Ended
Dec. 31, 2012
Leases [Abstract]  
Operating Leases of Lessee Disclosure [Table Text Block]
Future lease obligations required under non-cancelable operating leases as of December 31, 2012 were as follows (amounts in thousands):
Year ended December 31,
 
2013
$
4,751

2014
3,890

2015
2,268

2016
1,436

2017
1,058

Thereafter
2,976

 
$
16,379