Incentive Plan (Summary Of Stock Options) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Incentive Plan [Abstract]
Outstanding, beginning of period, Number of Options Granted	530,000
Options exercised, Number of Options Granted	(250,000)
Outstanding, end of period, Number of Options Granted	280,000
Exercisable, end of period, Number of Options Granted	280,000
Vested or expected to vest, end of period, Number of Options Granted	280,000
Outstanding, beginning of period, Weighted Average Exercise Price	$ 18.15
Options exercised, Weighted Average Exercise Price	$ 17.14
Outstanding, end of period, Weighted Average Exercise Price	$ 19.05
Exercisable, end of period, Weighted Average Exercise Price	$ 19.05
Vested or expected to vest, end of period, Weighted Average Exercise Price	$ 19.05
Outstanding, end of period, Weighted Average Remaining Contractual Term (Years)	1 year 4 months 24 days
Exercisable, end of period, Weighted Average Remaining Contractual Term (Years)	1 year 4 months 24 days
Vested or expected to vest, end of period, Weighted Average Remaining Contractual Term (Years)	1 year 4 months 24 days
Outstanding, end of period, Aggregate Intrinsic Value	$ 2,848
Exercisable, end of period, Aggregate Intrinsic Value	2,848
Vested or expected to vest, end of period, Aggregate Intrinsic Value	$ 2,848