Stock Compensation Plans (Details) (USD $)	3 Months Ended		9 Months Ended			12 Months Ended		9 Months Ended	12 Months Ended		0 Months Ended				9 Months Ended	12 Months Ended		0 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Employee Stock Option [Member]	Dec. 31, 2013 Employee Stock Option [Member]	Dec. 31, 2012 Employee Stock Option [Member]	Sep. 30, 2014 2002 Stock Option Plan [Member]	Dec. 31, 2013 2002 Stock Option Plan [Member]	Dec. 31, 2012 2002 Stock Option Plan [Member]	Sep. 09, 2014 2012 Stock Incentive Plan [Member]	Mar. 04, 2014 2012 Stock Incentive Plan [Member]	Aug. 05, 2013 2012 Stock Incentive Plan [Member]	Mar. 04, 2013 2012 Stock Incentive Plan [Member]	Sep. 30, 2014 2012 Stock Incentive Plan [Member]	Dec. 31, 2013 2012 Stock Incentive Plan [Member]	Dec. 31, 2012 2012 Stock Incentive Plan [Member]	Sep. 09, 2014 2012 Stock Incentive Plan [Member] Chief Executive Officer and President [Member]	Mar. 04, 2014 2012 Stock Incentive Plan [Member] Chief Executive Officer and President [Member]	Aug. 05, 2013 2012 Stock Incentive Plan [Member] Chief Executive Officer and President [Member]	Mar. 04, 2013 2012 Stock Incentive Plan [Member] Chief Executive Officer and President [Member]	Sep. 09, 2014 2012 Stock Incentive Plan [Member] Chief Financial Officer [Member]	Mar. 04, 2014 2012 Stock Incentive Plan [Member] Chief Financial Officer [Member]	Aug. 05, 2013 2012 Stock Incentive Plan [Member] Chief Financial Officer [Member]	Mar. 04, 2013 2012 Stock Incentive Plan [Member] Chief Financial Officer [Member]	Sep. 09, 2014 2012 Stock Incentive Plan [Member] Director [Member]	Mar. 04, 2014 2012 Stock Incentive Plan [Member] Director [Member]	Mar. 04, 2013 2012 Stock Incentive Plan [Member] Director [Member]	Sep. 09, 2014 2012 Stock Incentive Plan [Member] Other Employees [Member]	Mar. 04, 2014 2012 Stock Incentive Plan [Member] Other Employees [Member]	Mar. 04, 2013 2012 Stock Incentive Plan [Member] Other Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized to grant options to purchase (in shares)					900,000			1,800,000							1,000,000
Share-based payment award, expiration date					Sep. 30, 2008			Apr. 30, 2012							Apr. 05, 2022
Expected term of stock options in Black-Scholes option pricing model, previous			4 years
Expected term of stock options in Black-Scholes option pricing model, revised			2 years
Stock Option Plans, Number of Shares [Abstract]
Outstanding (in shares)					3,000	78,500	89,750	523,521	702,597	624,700
Granted (in shares)					0	0	0	0	0	181,500
Exercised (in shares)					(3,000)	(500)	0	(268,984)	(165,577)	(33,104)
Cancelled (in shares)					0	(75,000)	(11,250)	(4,234)	(13,499)	(70,499)
Outstanding (in shares)					0	3,000	78,500	250,303	523,521	702,597
Stock Options, Weighted Average Option Exercise Price [Abstract]
Outstanding (in dollars per share)					$ 8.67	$ 12.73	$ 12.83	$ 4.54	$ 5.17	$ 6.15
Granted (in dollars per share)					$ 0	$ 0	$ 0	$ 0	$ 0	$ 4.40
Exercised (in dollars per share)					$ 8.67	$ 8.67	$ 0	$ 5.31	$ 7.15	$ 3.86
Cancelled (in dollars per share)					$ 0	$ 12.92	$ 13.54	$ 3.50	$ 5.41	$ 12.45
Outstanding (in dollars per share)					$ 0	$ 8.67	$ 12.73	$ 3.73	$ 4.54	$ 5.17
Other Than Stock Option Plans, Number of Shares [Abstract]
Outstanding (in shares)															249,500	0	0
Granted (in shares)											130,000	88,648	150,000	100,000	218,648	250,000	0	45,000	43,997	100,000	25,000	15,000	16,341	50,000	15,000	50,000	15,710	20,000	20,000	12,600	40,000
Exercised (in shares)															(68,988)	0	0
Cancelled (in shares)															(846)	(500)	0
Outstanding (in shares)															398,314	249,500	0
Other Than Stock Options, Fair Market Value at Grant [Abstract]
Outstanding (in dollars per share)															$ 8.24	$ 0	$ 0
Granted (in dollars per share)															$ 21.66	$ 8.23	$ 0
Exercised (in dollars per share)															$ 18.67	$ 0	$ 0
Cancelled (in dollars per share)															$ 7.73	$ 5.54	$ 0
Outstanding (in dollars per share)															$ 13.80	$ 8.24	$ 0
Options Exercisable at [Abstract]
March 31, 2014 (in shares)					0			181,603
December 31, 2014 (in shares)					0			1,000
December 31, 2015 (in shares)					0			67,700
December 31, 2016 (in shares)					0			0
December 31, 2017 (in shares)					0			0
December 31, 2018 (in shares)					0			0
Thereafter (in shares)					0			0
Total options exercisable (in shares)					0			250,303
Options Weighted Average Option Exercise Price at [Abstract]
March 31, 2014 (in dollars per share)					$ 0			$ 3.73
December 31, 2014 (in dollars per share)					$ 0			$ 3.73
December 31, 2015 (in dollars per share)					$ 0			$ 3.73
December 31, 2016 (in dollars per share)					$ 0			$ 3.73
December 31, 2017 (in dollars per share)					$ 0			$ 3.73
December 31, 2018 (in dollars per share)					$ 0			$ 3.73
Thereafter (in dollars per share)					$ 0			$ 3.73
Decrease in income from continuing operations due to change in accounting pronouncement	$ 367,000	$ 132,000	$ 831,000	$ 287,000
Decrease in net income due to change in accounting pronouncement	$ 228,000	$ 82,000	$ 518,000	$ 179,000
Net income (loss) per share after change in accounting pronouncement, basic (in dollars per share)	$ 0.59	$ 0.42	$ 2.39	$ 1.04
Net income (loss) per share after change in accounting pronouncement, diluted (in dollars per share)	$ 0.58	$ 0.40	$ 2.32	$ 1.01
Net income (loss) per share - basic (in dollars per share)	$ 0.57	$ 0.41	$ 2.35	$ 1.02
Net income per share - diluted (in dollars per share)	$ 0.56	$ 0.39	$ 2.28	$ 0.99
Summary information about stock options outstanding [Abstract]
Range of Exercise Price, Minimum (in dollars per share)								$ 2.45
Range of Exercise Price, Maximum (in dollars per share)					$ 0			$ 4.59
Options Outstanding (in shares)					0			250,303
Weighted Average Contractual Periods in Years					0 years			6 years 6 months 22 days
Weighted Average Exercise Price (in dollars per share)					$ 0			$ 3.73
Options Exercisable (in shares)					0			181,603