Description of Business and Significant Accounting Policies (Details) (USD $)	1 Months Ended	12 Months Ended			1 Months Ended	3 Months Ended
	Jul. 31, 2011	Dec. 31, 2014 segment	Dec. 31, 2013	Dec. 31, 2012	Jan. 31, 2013	Sep. 30, 2014
Property, Plant and Equipment [Line Items]
Service agreement term		1 year
Initial period of service term		90 days
Number of reportable segments		2
Notes receivable		$ 10,208,000	$ 2,892,000
Discounted notes receivable		10,196,000	2,880,000
Marketable securities		11,799,000
Unrealized gains from marketable securities		25,000
Amortization period of inventories and supplies		24 months
Depreciation expense		3,946,000	3,373,000	2,947,000
Impairment loss on goodwill and intangible assets		0	0	0
Percentage of reduction of Medicare payments to nursing centers	11.10%
Autos And Trucks [Member]
Property, Plant and Equipment [Line Items]
Useful life		3 years
Minimum [Member]
Property, Plant and Equipment [Line Items]
Days to notify cancellation of service		30 days
Property and equipment payment terms		24 months
Percentage of revenue from a major client		3.00%
Minimum [Member] | Laundry And Linen Equipment Installations [Member]
Property, Plant and Equipment [Line Items]
Useful life		3 years
Minimum [Member] | Housekeeping, And Office Furniture And Equipment [Member]
Property, Plant and Equipment [Line Items]
Useful life		3 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Days to notify cancellation of service		90 days
Property and equipment payment terms		60 months
Percentage of reduction of Medicare payments to plans and providers					2.00%
Percentage of revenue from a major client		6.00%
Maximum [Member] | Laundry And Linen Equipment Installations [Member]
Property, Plant and Equipment [Line Items]
Useful life		7 years
Maximum [Member] | Housekeeping, And Office Furniture And Equipment [Member]
Property, Plant and Equipment [Line Items]
Useful life		7 years
Change in Self-Insurance Reserve [Member]
Property, Plant and Equipment [Line Items]
Self-insurance claims reserve adjustment						$ 37,416,000
Non-cash, tax-effected charge, impact per diluted share						$ 0.33
Change in Self-Insurance Reserve [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated self-insurance claim close-out period						15 years
Change in Self-Insurance Reserve [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated self-insurance claim close-out period						17 years