Equity Incentive Awards	9 Months Ended
Equity Incentive Awards	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Equity Incentive Awards	Equity Incentive Awards Stock-based compensation expense, reported in general and administrative on the Consolidated Statements of Income and Comprehensive Income, for the quarters ended September 30, 2017 and 2016 was approximately $2.6 million and $2.4 million, respectively, and for both the nine months ended September 30, 2017 and 2016 was approximately $6.8 million. Our 2014 Equity Incentive Plan (the “2014 Plan”) was adopted by our Board of Directors on March 11, 2014 and approved by our stockholders on May 13, 2014. Pursuant to the 2014 Plan, our officers, directors, employees and consultants may be awarded (i) shares of common stock (“Restricted Stock”), (ii) options to acquire shares of common stock (“Options”), including non-qualified stock options and incentive stock options within the meaning of Section 422 of the Internal Revenue Code, and (iii) other forms of equity awards, subject to conditions and restrictions determined by the Compensation, Nominating, and Corporate Governance Committee of our Board of Directors (the “Compensation Committee”). The Compensation Committee will determine the vesting schedule, if any, of each Restricted Stock Grant or Option and the term of each Option, which term shall not exceed ten years from the date of grant. Shares that do not vest are forfeited. Dividends paid on restricted stock are not returnable, even if the underlying stock does not entirely vest. A maximum of 3,750,000 shares of common stock were originally available for grant under the 2014 Plan. As of September 30, 2017, 3,126,885 shares remained available for grant. Grants under the 2014 Plan are approved by the Compensation Committee, which determines the individuals eligible to receive awards, the types of awards, and the terms, conditions and restrictions applicable to any award, except grants to directors which are approved by the Board of Directors. On May 2, 2017, we awarded certain members of our Board of Directors 55,238 shares of Restricted Stock at a fair market value of approximately $4.5 million and Options to purchase 6,930 shares of common stock with an exercise price of $81.15 per share. The shares of common stock covered by these awards are subject to multiple tranches that vest between November 2, 2017 and May 2, 2020. On February 1, 2017, we awarded 75,000 shares of Restricted Stock at a fair market value of approximately $5.4 million to certain members of our senior management for their service in 2017. These restricted stock grants will vest on December 31, 2017. The fair market value of our restricted stock grants was determined by using the closing share price of our common stock on the date the shares were issued and is recorded as compensation expense and paid in capital over the vesting period.

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.