Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jan. 02, 2012
Current
Federal	$ 8,689,000	$ 14,676,000	$ 13,014,000
State and local	3,554,000	3,521,000	4,696,000
Foreign	1,189,000	1,878,000	2,054,000
Total current	13,432,000	20,075,000	19,764,000
Deferred
Federal	3,532,000	2,831,000	6,983,000
State and local	(2,142,000)	(1,232,000)	(153,000)
Foreign	354,000	(878,000)	(117,000)
Total deferred	1,744,000	721,000	6,713,000
Total income tax expense (benefit)	15,176,000	20,796,000	26,477,000
The U.S. and foreign components of income before income taxes
United States	33,143,000	52,287,000	61,810,000
Foreign	6,474,000	3,905,000	6,727,000
Income from continuing operations before income taxes	39,617,000	56,192,000	68,537,000
Differences between total income tax expense (benefit) and the amount computed by applying the statutory federal income tax rate
Computed expected income tax expense (benefit)	13,866,000	19,667,000	23,988,000
Net effect of state income taxes	918,000	2,501,000	2,998,000
Foreign subsidiary dividend inclusions	1,125,000	120,000	174,000
Foreign tax rate benefit	(570,000)	(366,000)	(417,000)
Change in beginning of year valuation allowance	(87,000)	(1,225,000)	(117,000)
Other, net	(76,000)	99,000	(149,000)
Total income tax expense (benefit)	15,176,000	20,796,000	26,477,000
Differences between total income tax expense (benefit) and the amount computed by applying the statutory federal income tax rate
Computed expected income tax expense (benefit) (as a percent)	35.00%	35.00%	35.00%
Net effect of state income taxes (as a percent)	2.00%	4.00%	4.00%
Foreign subsidiary dividend inclusions (as a percent)	3.00%	0.00%	0.00%
Foreign tax rate benefit (as a percent)	(1.00%)	(1.00%)	(1.00%)
Change in beginning of year valuation allowance (as a percent)	0.00%	(2.00%)	0.00%
Other, net (as a percent)	0.00%	0.00%	0.00%
Income tax expense (benefit) for the period (as a percent)	38.00%	37.00%	39.00%
Allocation of income tax expense (benefit)
Continuing operations	15,176,000	20,796,000	26,477,000
Discontinued operations	1,225,000	(48,959,000)	3,298,000
Loss on sale	(9,047,000)	(2,147,000)	0
Stockholders' equity	17,373,000	(736,000)	(5,910,000)
Total	24,727,000	(31,046,000)	23,865,000
Deferred tax assets
Deferred compensation and retirement plan	14,449,000	31,515,000
Accrued expenses not deductible until paid	4,430,000	5,459,000
Employee stock-based compensation	2,561,000	4,000,000
Accrued payroll not deductible until paid	2,270,000	2,363,000
Accounts receivable, net	1,345,000	1,963,000
Other, net	124,000	158,000
State income tax	269,000	69,000
Federal net operating loss carryforwards	130,000	151,000
Foreign net operating loss carryforwards	2,750,000	2,439,000
State net operating loss carryforwards	2,037,000	2,214,000
Foreign tax credit carryforwards	1,125,000	0
Capital loss carryforwards	6,713,000	0
Total gross deferred tax assets	38,203,000	50,331,000
Less valuation analysis	(10,744,000)	(2,439,000)		(3,600,000)
Net deferred tax assets	27,459,000	47,892,000
Deferred tax liabilities
Property, plant and equipment	(7,250,000)	(11,787,000)
Goodwill and other intangibles	(78,301,000)	(81,859,000)
Total gross deferred tax liabilities	(85,551,000)	(93,646,000)
Net deferred tax liabilities	(58,092,000)	(45,754,000)
Non-current deferred tax assets netted with long-term deferred tax liabilities	$ 19,800,000	$ 39,700,000