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Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Condensed Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 9,506	$ 4,734
Other comprehensive income (loss), net of tax:
Pension liability adjustment, net of tax	65	137
Deferred gain (loss) on cash flow derivatives, net of tax	111	(31)
Other comprehensive income, net of tax	176	106
Comprehensive income	$ 9,682	$ 4,840

X

- Definition

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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