Income Taxes (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 01, 2012	Jan. 02, 2011	Jan. 03, 2010
Operating Loss Carryforwards [Line Items]
Operating losses Canadian & UK	$ 1.6
Income Taxes (Textual) [Abstract]
Income before income taxes included income from domestic operations	180.7	168.1	148.6
Valuation allowance	0.9	0.3	0.4
Additional paid in capital	7.2	1.5	0.8
Interest related to unrecognized tax benefits	1.7	0.9
Interest	2.5	0.8
Reduction in unrecognized tax benefit for federal and state tax items	6.4
Estimated deferred tax liability	10.3
Amount of undistributed foreign earnings	54.5
Investment Credit [Member]
Operating Loss Carryforwards [Line Items]
Canadian Investment Tax Credits	21.2
Investment Credit [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Tax credit expiration dates	2052
Investment Credit [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Tax credit expiration dates	2048
State [Member]
Operating Loss Carryforwards [Line Items]
Canadian Investment Tax Credits	5.2
Canadian (federal & provincial) and UK [Member]
Operating Loss Carryforwards [Line Items]
Operating losses Canadian & UK	12.0
Canadian federal and provincial [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Operating losses expiration dates	2031
Canadian federal and provincial [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Operating losses expiration dates	2030
Canadian Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating losses Canadian & UK	4.8
Canadian provincial [Member]
Operating Loss Carryforwards [Line Items]
Operating losses Canadian & UK	5.5
Domestic Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating losses Canadian & UK	4.4
Domestic Federal [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Operating losses expiration dates	2031
Domestic Federal [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Operating losses expiration dates	2023
State [Member]
Operating Loss Carryforwards [Line Items]
Operating losses Canadian & UK	$ 103.7
State [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Operating losses expiration dates	2026
State [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Operating losses expiration dates	2024