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Stock-Based Compensation	9 Months Ended
Stock-Based Compensation	Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation During nine months ended September 30, 2018, the Company granted 259,356 shares of restricted stock with a weighted-average grant-date fair value of $63.50 per share. The Company records stock-based compensation expense within general and administrative expenses in the accompanying Consolidated Statements of Operations.