Stock Compensation Plan (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2013
Summary of stock options outstanding
Number of Shares	1,093,000
Stock Options Grant [Member]
Summary of stock options outstanding
Date of Grant	Jan. 09, 2006
Number of employees, shares granted	1
Number of Shares	44,200
Option Price	$ 15.62
Expiration Date	Jan. 09, 2014
Stock Options Grant One [Member]
Summary of stock options outstanding
Date of Grant	Jan. 09, 2006
Number of employees, shares granted	1
Number of Shares	5,800
Option Price	$ 17.21
Expiration Date	Jan. 09, 2014
Stock Options Grant Two [Member]
Summary of stock options outstanding
Date of Grant	Jul. 21, 2006
Number of employees, shares granted	9
Number of Shares	34,000
Option Price	$ 15.15
Expiration Date	Jul. 21, 2014
Stock Options Grant Three [Member]
Summary of stock options outstanding
Date of Grant	Jan. 03, 2007
Number of employees, shares granted	1
Number of Shares	44,200
Option Price	$ 15.51
Expiration Date	Jan. 03, 2015
Stock Options Grant Four [Member]
Summary of stock options outstanding
Date of Grant	Jan. 03, 2007
Number of employees, shares granted	1
Number of Shares	5,800
Option Price	$ 17.06
Expiration Date	Jan. 03, 2015
Stock Options Grant Five [Member]
Summary of stock options outstanding
Date of Grant	Jul. 16, 2007
Number of employees, shares granted	12
Number of Shares	51,000
Option Price	$ 14.21
Expiration Date	Jul. 16, 2015
Stock Options Grant Six [Member]
Summary of stock options outstanding
Date of Grant	Sep. 20, 2007
Number of employees, shares granted	2
Number of Shares	7,000
Option Price	$ 13.19
Expiration Date	Sep. 20, 2015
Stock Options Grant Seven [Member]
Summary of stock options outstanding
Date of Grant	Jan. 08, 2008
Number of employees, shares granted	1
Number of Shares	42,300
Option Price	$ 11.79
Expiration Date	Jan. 08, 2016
Stock Options Grant Eight [Member]
Summary of stock options outstanding
Date of Grant	Jan. 08, 2008
Number of employees, shares granted	1
Number of Shares	7,700
Option Price	$ 12.97
Expiration Date	Jan. 08, 2016
Stock Options Grant Nine [Member]
Summary of stock options outstanding
Date of Grant	Sep. 25, 2008
Number of employees, shares granted	12
Number of Shares	43,000
Option Price	$ 7.55
Expiration Date	Sep. 25, 2016
Stock Options Grant Ten [Member]
Summary of stock options outstanding
Date of Grant	Jan. 07, 2009
Number of employees, shares granted	1
Number of Shares	14,000
Option Price	$ 7.12
Expiration Date	Jan. 07, 2017
Stock Options Grant Eleven [Member]
Summary of stock options outstanding
Date of Grant	Jan. 07, 2009
Number of employees, shares granted	1
Number of Shares	61,000
Option Price	$ 6.47
Expiration Date	Jan. 07, 2017
Stock Options Grant Twelve [Member]
Summary of stock options outstanding
Date of Grant	Mar. 03, 2009
Number of employees, shares granted	1
Number of Shares	3,000
Option Price	$ 5.42
Expiration Date	Mar. 03, 2017
Stock Options Grant Thirteen [Member]
Summary of stock options outstanding
Date of Grant	Jun. 22, 2009
Number of employees, shares granted	13
Number of Shares	53,000
Option Price	$ 7.57
Expiration Date	Jun. 22, 2017
Stock Options Grant Fourteen [Member]
Summary of stock options outstanding
Date of Grant	Jan. 08, 2010
Number of employees, shares granted	1
Number of Shares	10,900
Option Price	$ 9.13
Expiration Date	Jan. 08, 2018
Stock Options Grant Fifteen [Member]
Summary of stock options outstanding
Date of Grant	Jan. 08, 2010
Number of employees, shares granted	1
Number of Shares	14,100
Option Price	$ 8.3
Expiration Date	Jan. 08, 2018
Stock Options Grant Sixteen [Member]
Summary of stock options outstanding
Date of Grant	Jul. 27, 2010
Number of employees, shares granted	12
Number of Shares	80,000
Option Price	$ 11.4
Expiration Date	Jul. 27, 2018
Stock Options Grant Seventeen [Member]
Summary of stock options outstanding
Date of Grant	Aug. 11, 2010
Number of employees, shares granted	1
Number of Shares	6,000
Option Price	$ 11.23
Expiration Date	Aug. 11, 2018
Stock Options Grant Eighteen [Member]
Summary of stock options outstanding
Date of Grant	Jul. 05, 2011
Number of employees, shares granted	12
Number of Shares	80,000
Option Price	$ 11.16
Expiration Date	Jul. 05, 2019
Stock Options Grant Nineteen [Member]
Summary of stock options outstanding
Date of Grant	Aug. 29, 2012
Number of employees, shares granted	15
Number of Shares	94,000
Option Price	$ 11.29
Expiration Date	Aug. 29, 2020
Stock Options Grant Twenty [Member]
Summary of stock options outstanding
Date of Grant	Feb. 28, 2013
Number of employees, shares granted	1
Number of Shares	10,000	[1]
Option Price	$ 10.02
Expiration Date	Feb. 28, 2021
Stock Options Grant Twenty One [Member]
Summary of stock options outstanding
Date of Grant	Jun. 26, 2013
Number of employees, shares granted	24
Number of Shares	382,000	[1]
Option Price	$ 10.08
Expiration Date	Jun. 26, 2021

[1] * Unexercisable