Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
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Balance Type:	na
Period Type:	duration

- Definition

For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Balance Type:	credit
Period Type:	instant

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

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- Definition

Date the declared dividend will be paid, in CCYY-MM-DD format.

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-Name Accounting Standards Codification
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Period Type:	duration

- Definition

Date the dividend to be paid was declared, in CCYY-MM-DD format.

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- Definition

Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

+ References

No definition available.

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- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

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Subsequent Events - Additional Information (Details) - USD ($)				12 Months Ended
	Feb. 16, 2018	Feb. 01, 2018	Jan. 16, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Subsequent Event [Line Items]
Dividends declared per common share				$ 1.20	$ 0.96	$ 0.76
Repayment of debt				$ 1,922,329,000	$ 80,140,000	$ 166,290,000
Subsequent Event [Member] \| Term Loans B [Member]
Subsequent Event [Line Items]
Repayment of debt		$ 20,000,000
Subsequent Event [Member] \| Class A Common Stock [Member]
Subsequent Event [Line Items]
Dividends declared per common share		$ 0.375
Dividends, date declared		Feb. 01, 2018
Dividends, date payable		Mar. 02, 2018
Dividends, date of record		Feb. 16, 2018
Subsequent Event [Member] \| Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Repayment of debt	$ 20,000,000
LKQD Technologies Inc [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Acquisition date			Jan. 16, 2018
Cash paid in business acquisition			$ 90,000,000
Maximum Earnout payment			35,000,000
LKQD Technologies Inc [Member] \| Subsequent Event [Member] \| Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Borrowing from revolving credit facility			$ 44,000,000