Equity And Stock-Based Compensation (Schedule Of Stock Options Outstanding And Exercisable) (Details) - $ / shares	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2015		Jun. 30, 2015	Mar. 31, 2015	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Equity And Stock-Based Compensation [Line Items]
Weighted Average Exercise Price of Options Outstanding, Granted					$ 13.30	$ 7.40
Weighted average remaining contractual life of all options outstanding, vested, and expected to vest	3 years 3 months 11 days		3 years 2 months 23 days	3 years 18 days			2 years 5 months 9 days
Weighted average remaining contractual life of the exercisable options outstanding	2 years 7 months 24 days		2 years 4 months 28 days	2 years 7 months 21 days			3 years 1 month 10 days
Class A [Member]
Equity And Stock-Based Compensation [Line Items]
Common Stock Options Outstanding, Beginning balance	538.00		532.00	568.00	568.00
Common Stock Options Outstanding, Granted			100.00	12.00
Common Stock Options Outstanding, Exercised	(10.00)		(90.00)	(48.00)
Common Stock Options Outstanding, Forfeited	(4.00)		(4.00)
Common Stock Options Outstanding, Ending balance	524.00		538.00	532.00	524.00		568.00
Weighted Average Exercise Price of Options Outstanding, Beginning price	$ 8.49		$ 7.01	$ 6.88	$ 6.88
Weighted Average Exercise Price of Options Outstanding, Granted			13.42	12.34
Weighted Average Exercise Price of Options Outstanding, Exercised	8.35		5.29	6.87
Weighted Average Exercise Price of Options Outstanding, Forfeited	6.23		6.23
Weighted Average Exercise Price of Options Outstanding, Ending price	$ 8.51		$ 8.49	$ 7.01	$ 8.51		$ 6.88
Common Stock Exercisable Options, Outstanding Beginning balance	253.00		314.00	348.00	348.00
Common Stock Exercisable Options Outstanding, Granted	13.00		31.00	13.00
Common Stock Exercisable Options Outstanding, Exercised	(10.00)		(89.00)	(47.00)
Common Stock Exercisable Options Outstanding, Forfeited	(2.00)		(3.00)
Common Stock Exercisable Options, Outstanding Ending balance	254.00		253.00	314.00	254.00		348.00
Weighted Average Price of Exercisable Options, Outstanding Beginning balance	$ 7.56		$ 7.02	$ 6.82	$ 6.82
Weighted Average Price of Exercisable Options, Outstanding Ending balance	$ 7.46		$ 7.56	$ 7.02	$ 7.46		$ 6.82
Class B [Member]
Equity And Stock-Based Compensation [Line Items]
Common Stock Options Outstanding, Beginning balance	100.00		185.00	185.00	185.00
Common Stock Options Outstanding, Exercised	(100.00)		(85.00)
Common Stock Options Outstanding, Ending balance			100.00	185.00			185.00
Weighted Average Exercise Price of Options Outstanding, Beginning price	$ 10.24		$ 9.90	$ 9.90	$ 9.90
Weighted Average Exercise Price of Options Outstanding, Exercised	$ 10.24		9.51
Weighted Average Exercise Price of Options Outstanding, Ending price			$ 10.24	$ 9.90			$ 9.90
Common Stock Exercisable Options, Outstanding Beginning balance	100.00		185.00	185.00	185.00
Common Stock Exercisable Options Outstanding, Exercised	(100.00)	[1]	(85.00)
Common Stock Exercisable Options, Outstanding Ending balance			100.00	185.00			185.00
Weighted Average Price of Exercisable Options, Outstanding Beginning balance	$ 10.24		$ 9.90	$ 9.90	$ 9.90
Weighted Average Price of Exercisable Options, Outstanding Ending balance			$ 10.24	$ 9.90			$ 9.90

[1] The 100,000 Class B common stock options were exercised by a trust owned by the beneficial owners of the Company.