Regulatory Rate Filings (Details) (USD $) In Thousands, unless otherwise specified	Oct. 03, 2013	Jan. 03, 2012
Regulated Operations [Abstract]
Requested rate increase, authorized revenue, year one		$ 47,394
Requested rate increase, authorized revenue, year one percent		21.51%
Requested rate increase, authorized revenue, year two		12,963
Requested rate increase, authorized revenue, year two percent		4.87%
Requested rate increase, authorized revenue, year three		34,797
Requested rate increase, authorized revenue, year three percent		12.59%
Requested Recovery of Under-Collected Balance Accounts		2,599
Amount of net over-collection requested to be refunded to customers		650
Increase requested percent of authorized revenue	23.10%
Requested rate increase, authorized revenue	$ 2,400