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Share-Based Payments	9 Months Ended
Share-Based Payments	Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Payments	Share-Based Payments During the nine months ended September 30, 2018, the Company granted 94,984 shares of time-based restricted stock and 77,456 shares of total return-based restricted stock with weighted average grant date fair values per share of $43.01 and $40.81, respectively. We recorded share-based compensation expense of $1.1 million and $0.9 million during the three months ended September 30, 2018 and 2017, respectively, and $6.6 million and $5.8 million during the nine months ended September 30, 2018 and 2017, respectively. At September 30, 2018, there was $5.8 million of total unrecognized share-based compensation costs, which will be recognized over a weighted average remaining contractual term of 2.4 years.