Share-based incentives	3 Months Ended
Share-based incentives	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-based incentives	Share-based incentives. In January 2015 and 2014, respectively, the Company granted executives and senior management shares of restricted common stock which are time-based and vest at the end of three years. The Company also granted performance-based shares which vest upon achievement of certain financial objectives over a period of three years. The aggregate fair values of these awards were $4.2 million (113,000 shares with an average price of $37.04) and $4.0 million (124,000 shares with an average price of $32.22). Awards were made pursuant to the Company’s employee incentive compensation plans, and compensation expense associated with restricted stock awards will be recognized 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.

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