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Compensation Plans - Expense Recognition of Deferred Compensation (Detail) - Restricted Stock Units (RSUs)	Mar. 31, 2017 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
2017 (Remaining Period)	$ 4,845,782
2018	4,773,030
2019	4,036,576
2020	2,364,048
2021	872,849
Thereafter	907,498
Total	$ 17,799,783

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Unrecognized cost of unvested share-based compensation awards.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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