Performance Incentive Plan (Tables)

12 Months Ended

Dec. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Restricted Stock Activity

The following summarizes the restricted stock activity for the year ended December 31, 2015:

	Number of Shares		Weighted Average Share Price
Non-vested restricted shares, January 1	1,005,644		$	30.93
Restricted shares granted	267,133		41.00
Restricted shares vested	(318,261	)	27.83
Restricted shares forfeited	(46,478	)	26.85
Restricted shares repurchased	(11,371	)	27.20
Non-vested restricted shares, December 31	896,667		$	35.13

Schedule of Other Share-based Compensation, Activity

The following summarizes other grants made during the year ended December 31, 2015, pursuant to the 2007 Plan.

	Shares	Weighted Average   Share Price
Other share grants under the 2007 Plan:
Directors’ fees	18,130	$	38.96
Deferred directors’ fees	16,010	39.04
	34,140	$	39.00
Shares available under the 2007 Plan for grant, end of period	3,344,817