Income Tax (Tables)

12 Months Ended

Dec. 31, 2011

Income Tax [Abstract]

Income Tax Provision (Benefit) On Income From Operations

	Years ended December 31,
	2011			2010			2009
Current:
Federal	$	17,239		$	13,552		$	16,822
State		2,233			2,252			2,536
		19,472			15,804			19,358
Deferred		(2,916	)		(959	)		(1,730	)
	$	16,556		$	14,845		$	17,628

Reconciliation Of U.S. Statutory Income Tax Rate To Effective Income Tax Expense Rate

	Years ended December 31,
	2011			2010			2009
Federal income tax expense at statutory rate	$	15,440		$	13,965		$	15,623
State income tax, net of federal income tax benefit		1,238			1,218			1,634
Non-deductible business expenses		918			976			965
Qualified manufacturing activities		(840	)		(728	)		(586	)
Research and development credit		(177	)		(579	)		—
Other, net		(23	)		(7	)		(8	)
	$	16,556		$	14,845		$	17,628

Schedule Of Deferred Tax Assets And Liabilities

	2011			2010
Deferred income tax assets:
Operating expenses not currently deductible	$	4,597		$	2,642
Employee benefit plans		5,156			4,020
Capital loss carryforward		203			160
Property and equipment		397			195
Total deferred income tax assets		10,353			7,017
Deferred income tax liabilities:
Intangible assets		(10,043	)		(9,673	)
Other		(156	)		(149	)
Total deferred income tax liabilities		(10,199	)		(9,822	)
Net deferred income tax assets (liabilities)	$	154		$	(2,805	)