Share-based incentives	12 Months Ended
Share-based incentives	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-based incentives	Share-based incentives. The Company granted executives and senior management shares of restricted Common Stock which are performance and time-based and vest over a period of three years with fair values of $4.0 million (124,000 shares with an average price of $32.22), $2.2 million (82,000 shares with an average price of $26.13) and $1.3 million (63,000 shares with an average price of $20.81), respectively. Awards were 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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