Significant Accounting Policies and Practices (Details)	1 Months Ended	3 Months Ended	12 Months Ended
	Oct. 31, 2014 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2016 USD ($) voting_interest_model_entity variable_interest_entity partnership	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2015 USD ($)	Oct. 31, 2012 USD ($)
Significant Accounting Policies [Line Items]
Cash and cash equivalents restricted to withdrawals		$ 900,000	$ 300,000	$ 900,000
Allowance for doubtful accounts		900,000	400,000	900,000
Impairment loss as a result of goodwill			$ 0	0	$ 0
Forecasted period for income statement and working capital projections to assess goodwill impairment			5 years
Debt issuance costs			$ 1,600,000	2,400,000
Accumulated amortization of debt issuance costs		8,200,000	9,000,000	8,200,000
Amortization expense			800,000	900,000	1,300,000
Book overdrafts		25,800,000	36,500,000	25,800,000
Advertising expenses			1,200,000	1,600,000	1,300,000
Equity earnings in related investments			2,400,000	2,000,000	1,900,000
Ownership percentage	30.00%
Recognition of pre-tax gain	$ 4,100,000
Cash received from sale of business, net			0	1,000,000	0
Reclassification into deferred tax asset, non current		15,700,000	$ 17,900,000	15,700,000
Discontinued Operations, Disposed of by Sale | Security Business
Significant Accounting Policies [Line Items]
Sale price of business						$ 1,800,000
Gain on sale of business		500,000
Cash received from sale of business, net		$ 1,000,000
Period of cash consideration to be received		18 months
Contingent consideration receivable from sale of business		$ 500,000
Minimum
Significant Accounting Policies [Line Items]
Voting interest ownership percentage			30.00%
Maximum
Significant Accounting Policies [Line Items]
Voting interest ownership percentage			50.00%
Equipment | Minimum
Significant Accounting Policies [Line Items]
Ranges of estimated useful life			2 years
Equipment | Maximum
Significant Accounting Policies [Line Items]
Ranges of estimated useful life			10 years
Leasehold improvements | Maximum
Significant Accounting Policies [Line Items]
Ranges of estimated useful life			10 years
Leasehold improvements | Average
Significant Accounting Policies [Line Items]
Ranges of estimated useful life			8 years 4 months 24 days
Partnerships and joint ventures
Significant Accounting Policies [Line Items]
Number of ownership interest entities | partnership			29
Interest rate swaps | Cash flow hedges
Significant Accounting Policies [Line Items]
Aggregate starting notional amount							$ 150,000,000.0
Fixed rate (as a percentage)							0.7525%
Variable rate basis			LIBOR
Ineffective portion of cash flow hedges recognized			$ 0
Central Merger
Significant Accounting Policies [Line Items]
Cost of property repairs and maintenance			700,000	4,600,000	$ 1,300,000
Structural and repair costs incurred			$ 200,000
Variable Interest Entity, Primary Beneficiary
Significant Accounting Policies [Line Items]
Number of ownership interest entities | variable_interest_entity			21
Variable Interest Entity, Not Primary Beneficiary
Significant Accounting Policies [Line Items]
Number of ownership interest entities | voting_interest_model_entity			8
Accounting Standards Update 2015-07 | New Accounting Pronouncement, Early Adoption, Effect
Significant Accounting Policies [Line Items]
Current deferred tax asset reclassification		12,300,000		12,300,000
Reclassification into deferred tax asset, non current		$ 12,300,000		$ 12,300,000