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Subsequent Events - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Feb. 13, 2017 | Jan. 03, 2017 | Nov. 29, 2016 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Jan. 24, 2017
Subsequent Event [Line Items] |  |  |  |  |  |  |
Cash dividend |  |  |  | $ 3.60 | $ 2.80 | $ 2.00 |
Revolving credit agreement maximum borrowing capacity |  |  |  | $ 600,000 |  |  |
Carrier Enterprise II |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Additional ownership interest acquired |  |  | 10.00% |  |  |  |
Cash consideration |  |  | $ 42,909 |  |  |  |
Carrier Enterprise II | Subsequent Event |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Additional ownership interest acquired | 10.00% |  |  |  |  |  |
Cash consideration | $ 42,688 |  |  |  |  |  |
Controlling interest, ownership percentage | 80.00% |  |  |  |  |  |
Letter of Credit |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Revolving credit agreement maximum borrowing capacity |  |  |  | $ 50,000 |  |  |
Letter of Credit | Subsequent Event |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Revolving credit agreement maximum borrowing capacity |  |  |  |  |  |  | $ 10,000
Common Stock | Subsequent Event |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Cash dividend |  | $ 1.05 |  |  |  |  |
Dividends, date declared |  | Jan. 03, 2017 |  |  |  |  |
Dividends, payable date |  | Jan. 31, 2017 |  |  |  |  |
Dividends, date of record |  | Jan. 17, 2017 |  |  |  |  |
Class B Common Stock | Subsequent Event |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Cash dividend |  | $ 1.05 |  |  |  |  |
Dividends, date declared |  | Jan. 03, 2017 |  |  |  |  |
Dividends, payable date |  | Jan. 31, 2017 |  |  |  |  |
Dividends, date of record |  | Jan. 17, 2017 |  |  |  |  |

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: 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 + Details
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- Definition Date the declared dividend will be paid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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- Definition Date the dividend to be paid was declared, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + 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 -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: 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=66902209&loc=d3e3213-108585 + Details
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- 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. + Details
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