Legal and Other Commitments and Contingencies	6 Months Ended
Jun. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Legal and Other Commitments and Contingencies	Legal and Other Commitments and Contingencies The Company is subject to claims and litigation in the normal course of its business. The Company applies the provisions as defined in the guidance related to accounting for contingencies in determining the recognition and measurement of potential liabilities associated with legal claims against the Company. Management uses guidance from internal and external legal counsel on the potential outcome of litigation in determining the need to record liabilities for potential losses and the disclosure of pending legal claims. Contracts Acquired in the Central Merger Certain lease contracts acquired in the Central Merger (as defined below) include provisions allocating to the Company responsibility for the cost of certain structural and other repairs required to be made to the leased property, including improvement and repair costs arising as a result of ordinary wear and tear. The Company recorded nil and $0.1 million of costs for the three months ended June 30, 2017 and 2016, respectively, and $0.1 million and $0.3 million for the six months ended June 30, 2017 and 2016, respectively, (net of expected recoveries of the total cost recognized by the Company through the applicable indemnity discussed further below and in Note 3. Central Merger and Restructuring, Merger and Integration Costs) in Cost of parking services—Lease contracts within the Condensed Consolidated Statements of Income for structural and other repair costs related to certain lease contracts acquired in the Central Merger, whereby the Company has expensed repair costs for certain leases and engaged third-party general contractors to complete certain structural and other repair projects, and other indemnity related costs. The Company expects to incur additional costs for certain structural and other repair costs pursuant to the contractual requirements of certain lease contracts acquired in the Central Merger (“Structural and Repair Costs”). Based on information available at this time, the Company currently expects to incur additional Structural and Repair Costs of $0.1 million. While the Company is unable to estimate with certainty when such remaining costs will be incurred, it is expected that a substantial majority of these costs will be incurred in mid- to late calendar year 2017. Additionally and as further described in Note 3. Central Merger and Restructuring, Merger and Integration Costs, the Company settled all outstanding matters between the former Central stockholders and the Company and is therefore unable to recover any additional Structural and Repair Costs yet to be incurred by the Company through the indemnity. Holten Settlement In March 2010, John V. Holten, a former indirect controlling shareholder of the Company, filed a lawsuit against the Company in the United States District Court, District of Connecticut. Mr. Holten was terminated as the Company's chairman in October 2009. The lawsuit alleged breach of his employment agreement and claimed that the agreement entitled Mr. Holten to payments worth more than $3.8 million. The Company filed an answer and counterclaim to Mr. Holten's lawsuit in 2010. In March 2016, the Company and Mr. Holten settled all claims in connection with the original lawsuits ("Holten Settlement"). Per the settlement, the Company paid Mr. Holten $3.4 million, of which $1.9 million was recovered by the Company through the Company's directors and officer's liability insurance policies. The Company recognized an expense, net of insurance recoveries, related to the Holten Settlement of $1.5 million for the six months ended June 30, 2016.

Legal and Other Commitments and Contingencies

The Company is subject to claims and litigation in the normal course of its business. The Company applies the provisions as defined in the guidance related to accounting for contingencies in determining the recognition and measurement of potential liabilities associated with legal claims against the Company. Management uses guidance from internal and external legal counsel on the potential outcome of litigation in determining the need to record liabilities for potential losses and the disclosure of pending legal claims.

Contracts Acquired in the Central Merger

Certain lease contracts acquired in the Central Merger (as defined below) include provisions allocating to the Company responsibility for the cost of certain structural and other repairs required to be made to the leased property, including improvement and repair costs arising as a result of ordinary wear and tear. The Company recorded nil and $0.1 million of costs for the three months ended June 30, 2017 and 2016, respectively, and $0.1 million and $0.3 million for the six months ended June 30, 2017 and 2016, respectively, (net of expected recoveries of the total cost recognized by the Company through the applicable indemnity discussed further below and in Note 3. Central Merger and Restructuring, Merger and Integration Costs) in Cost of parking services—Lease contracts within the Condensed Consolidated Statements of Income for structural and other repair costs related to certain lease contracts acquired in the Central Merger, whereby the Company has expensed repair costs for certain leases and engaged third-party general contractors to complete certain structural and other repair projects, and other indemnity related costs. The Company expects to incur additional costs for certain structural and other repair costs pursuant to the contractual requirements of certain lease contracts acquired in the Central Merger (“Structural and Repair Costs”). Based on information available at this time, the Company currently expects to incur additional Structural and Repair Costs of $0.1 million. While the Company is unable to estimate with certainty when such remaining costs will be incurred, it is expected that a substantial majority of these costs will be incurred in mid- to late calendar year 2017. Additionally and as further described in Note 3. Central Merger and Restructuring, Merger and Integration Costs, the Company settled all outstanding matters between the former Central stockholders and the Company and is therefore unable to recover any additional Structural and Repair Costs yet to be incurred by the Company through the indemnity.

Holten Settlement

In March 2010, John V. Holten, a former indirect controlling shareholder of the Company, filed a lawsuit against the Company in the United States District Court, District of Connecticut. Mr. Holten was terminated as the Company's chairman in October 2009. The lawsuit alleged breach of his employment agreement and claimed that the agreement entitled Mr. Holten to payments worth more than $3.8 million. The Company filed an answer and counterclaim to Mr. Holten's lawsuit in 2010.

In March 2016, the Company and Mr. Holten settled all claims in connection with the original lawsuits ("Holten Settlement"). Per the settlement, the Company paid Mr. Holten $3.4 million, of which $1.9 million was recovered by the Company through the Company's directors and officer's liability insurance policies. The Company recognized an expense, net of insurance recoveries, related to the Holten Settlement of $1.5 million for the six months ended June 30, 2016.