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Supplemental Disclosure of Cash Flow Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Supplemental Cash Flow Information [Abstract]
Interest paid	$ 445	$ 1,612	$ 971	$ 1,908
Income taxes paid	$ 6,987	$ 10,827	$ 7,422	$ 13,282

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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