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Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 1 Months Ended | 3 Months Ended | 26 Months Ended
--- | --- | --- | --- | --- | ---
Apr. 23, 2018 | Apr. 03, 2018 | Apr. 27, 2018 | Mar. 31, 2018 | Mar. 31, 2018
Subsequent Event |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Cash paid to acquire inventory, real estate, equipment and intangible assets | $ 12.5 | $ 26.1 |  |  |
Cash dividends declared per Class A and Class B share (in dollars per share) | $ 0.29 |  |  |  |
Dividends payable | $ 7.2 |  |  |  |
Class A common stock |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Shares repurchased pursuant to repurchase authorizations (in shares) |  |  |  | 50,000 | 1,092,725
Class A common stock | Subsequent Event |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Shares repurchased pursuant to repurchase authorizations (in shares) |  |  | 40,000 |  |
Average purchase price per share (in dollars per share) |  |  | $ 96.78 |  |
2016 Share Repurchase Authorization | Class A common stock |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Remaining authorized repurchase amount |  |  |  | $ 157.6 | $ 157.6
2016 Share Repurchase Authorization | Class A common stock | Subsequent Event |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Remaining authorized repurchase amount |  |  | $ 153.7 |  |

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- Definition Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6935-107765 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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- Definition Number of shares that have been repurchased and retired during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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