Stock Incentive Compensation and Employee Benefit Plans (Schedule of Option Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Weighted options outstanding
Beginning balance (in shares)	32,001	206,795
Options granted (in shares)	0	0
Options forfeited (in shares)	0	0
Options expired (in shares)	0	0
Options exercised (in shares)	(32,001)	(174,794)
Ending balance (in shares)	0	32,001	206,795
Weighted average exercise price
Beginning balance (in usd per share)	$ 53.86	$ 53.17
Options granted (in usd per share)	0	0
Options forfeited (in usd per share)	0	0
Options expired (in usd per share)	0	0
Options exercised (in usd per share)	53.86	53.04
Ending balance (in usd per share)	$ 0	$ 53.86	$ 53.17
Weighted average remaining contractual life	0 years	2 months 12 days	10 months 24 days
Aggregate intrinsic value, Options outstanding	$ 0	$ 2,295	$ 17,174
Aggregate intrinsic value, Options exercised	$ 2,320	$ 15,945
Range of exercise prices, lower range limit (in usd per share)			$ 50.71
Range of exercise prices, upper range limit (in usd per share)			$ 59.66
Range of exercise prices, Options exercised, lower range limit (in usd per share)		$ 50.71
Range of exercise prices, Options exercised, upper range limit (in usd per share)		59.66
Range of exercise prices, Options exercised (in usd per share)	$ 53.86
Range of exercise prices, Total options outstanding (in usd per share)	$ 0	$ 53.86