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Summary of Significant Accounting Policies and Recently Issued Accounting Standards - Schedule of Diluted Weighted Average Number of Common Shares Outstanding (Detail) - shares
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Increase in diluted weighted average number of common shares outstanding [1] 197,200,000 206,700,000 213,900,000
Accounting Standards Update 2016-09 [Member]      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Increase in diluted weighted average number of common shares outstanding 446,747    
[1] The Company early adopted ASU 2016-09 on a prospective basis as required, related to the recognition of excess tax benefits to the Consolidated Statement of Operations which were previously recorded in additional paid-in capital, effective January 1, 2016. This resulted in an additional 446,747 diluted weighted average number of common shares outstanding for the year ended December 31, 2016, and recognition of excess tax benefits of $18.1 million in the income tax provision for the year ended December 31, 2016. As a result, net earnings per common share increased by $0.10 per share for the year ended December 31, 2016. Refer to Note 2, “Summary of Significant Accounting Policies and Recently Issued Accounting Standards” of the Notes to the Consolidated Financial Statements for further details.