Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2011

Commitments and Contingencies [Abstract]

Future minimum rental commitments under noncancellable operating leases

At December 31, 2011, future minimum rental commitments under noncancellable operating leases are as follows ($ in thousands):

Year	Amount
2012	$	5,913
2013		4,985
2014		3,876
2015		3,097
2016		1,122
Thereafter		5,718
Total	$	24,711