Stock Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2015

Stock Incentive Plans (Tables) [Abstract]

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]

		Year Ended December 31,
	2015		2014		2013
Stock options	$	698	$	912	$	1,113
Restricted stock		30,146		31,163		19,064
	$	30,844	$	32,075	$	20,177

Non-vested stock incentive awards

	Restricted Stock
	Number of	Weighted-Average
	Shares	Grant Date
	(000's)	Fair Value
Non-vested at December 31, 2014	554	$	56.92
Vested	(306)		61.09
Granted	449		66.93
Terminated	(59)		66.09
Non-vested at December 31, 2015	638	$	62.00