Stock-Based Compensation (Details Textual) (USD $)	12 Months Ended				6 Months Ended		0 Months Ended		12 Months Ended		12 Months Ended						0 Months Ended		12 Months Ended
	Dec. 31, 2013 compensation_plan	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2006 Stock Incentive Plan [Member]	Jun. 30, 2008 Stock Incentive Plan [Member] Minimum [Member]	Jun. 30, 2008 Stock Incentive Plan [Member] Maximum [Member]	Jun. 19, 2012 2008 Equity Incentive Plan [Member]	Jun. 15, 2010 2008 Equity Incentive Plan [Member]	Dec. 31, 2013 2008 Equity Incentive Plan [Member]	May 29, 2008 2008 Equity Incentive Plan [Member]	Dec. 31, 2013 The Plans [Member]	Dec. 31, 2013 The Plans [Member] Selling, general and administrative expenses [Member]	Dec. 31, 2012 The Plans [Member] Selling, general and administrative expenses [Member]	Dec. 31, 2011 The Plans [Member] Selling, general and administrative expenses [Member]	Dec. 31, 2013 Employee Group 1 [Member]	Dec. 31, 2013 Director Group 1 [Member]	Jun. 19, 2012 Performance-based options [Member] 2006 Management Incentive Plan [Member] officer	Aug. 11, 2006 Performance-based options [Member] 2006 Management Incentive Plan [Member]	Dec. 31, 2013 Performance-based options [Member] 2006 Management Incentive Plan [Member] executive_officer	Dec. 31, 2012 Performance-based options [Member] 2006 Management Incentive Plan [Member]	Dec. 31, 2011 Performance-based options [Member] 2006 Management Incentive Plan [Member] executive_officer	Dec. 31, 2013 Common stock [Member] 2006 Management Incentive Plan [Member]	Dec. 31, 2011 Common stock [Member] 2006 Management Incentive Plan [Member]	Dec. 31, 2013 Restricted stock and restricted stock units [Member]	Dec. 31, 2013 Restricted stock and restricted stock units [Member] 2008 Equity Incentive Plan [Member]	Dec. 31, 2013 Restricted stock and restricted stock units [Member] Employee Group 1 [Member] 2008 Equity Incentive Plan [Member]	Dec. 31, 2012 Restricted stock and restricted stock units [Member] Employee Group 1 [Member] 2008 Equity Incentive Plan [Member]	Dec. 31, 2011 Restricted stock and restricted stock units [Member] Employee Group 1 [Member] 2008 Equity Incentive Plan [Member]	Dec. 31, 2012 Restricted stock and restricted stock units [Member] Director [Member] 2008 Equity Incentive Plan [Member]	Dec. 31, 2011 Restricted stock and restricted stock units [Member] Employee Inducement [Member] Minimum [Member]		Dec. 31, 2011 Restricted stock and restricted stock units [Member] Employee Inducement [Member] Maximum [Member]	Dec. 31, 2013 Restricted stock and restricted stock units [Member] Employee Inducement [Member] 2008 Equity Incentive Plan [Member]		Dec. 31, 2012 Restricted stock and restricted stock units [Member] Employee Inducement [Member] 2008 Equity Incentive Plan [Member]		Dec. 31, 2013 Stock options [Member] 2008 Equity Incentive Plan [Member]	Dec. 31, 2013 Stock options [Member] Employee Group 1 [Member]	Dec. 31, 2012 Stock options [Member] Employee Group 1 [Member]	Dec. 31, 2011 Stock options [Member] Employee Group 1 [Member]	Dec. 31, 2012 Stock options [Member] Director [Member]	Dec. 31, 2013 Stock options [Member] Director [Member] 2008 Equity Incentive Plan [Member]	Dec. 31, 2013 Stock options [Member] Employee Inducement [Member]		Dec. 31, 2012 Stock options [Member] Employee Inducement [Member]		Dec. 31, 2011 Stock options [Member] Employee Inducement [Member] Minimum [Member]	Dec. 31, 2011 Stock options [Member] Employee Inducement [Member] Maximum [Member]
Stock-Based Compensation (Textual) [Abstract]
Number of stock-based compensation plans	3
Number of shares authorized for grant				1,237,500			7,600,000	5,400,000		2,000,000								2,100,000.0
Stock award, term to expiration					5 years	7 years			7 years
Stock options vesting period					1 year	5 years									3 years	1 year	3 years									3 years	3 years	2 years	3 years	3 years	[1]	4 years	3 years	[2]	3 years	[3]	3 years	3 years	3 years	2 years	3 years	1 year	3 years	[4]	3 years	[1]	3 years	4 years
Stock options award vesting right																									vest in equal annual increments over the vesting period												vest in equal annual increments over the vesting period
Number of additional shares authorized for grant							2,200,000	3,400,000
Ratio of shares in restricted stock awards and other full value awards to shares in amended plan								1.41
Number of shares available for future grant									924,062
Percentage of performance units (percent)																		60.00%	60.00%
Percentage of fair market value (percent)																		40.00%	40.00%
Number of Officers																	7
Total of performance units were outstanding and fully vested (shares)																	154,264		44,076
Grant date fair value awards																	$ 1,200,000
Performance units settled in period (shares)																			93,664		44,831
Number of executive officers that settled performance units in period (executive officers)																			4		1
Number of former executive officers that settled performance units in period (executive officers)																			2
Performance units forfeited in period (shares)																			16,524					113,485
Number of former executive officers that forfeited performance units in period (executive officer)																			1
Common stock issued during period (shares)																						56,197	26,898
Cash payments for shares settled during period																						200,000	100,000
Selling, general and administrative expenses												6,300,000	6,300,000	5,100,000					500,000	200,000	100,000
Common stock issued for settlement of performance units, amount	0	0	0
Unrecognized stock-based compensation expense related to stock options											$ 6,600,000
Weighted-average period for recognizing stock compensation expense											1 year 11 months 9 days

[1] The Company granted non-qualified stock options outside its existing stock-based compensation plans in the third quarter of 2012 to one employee in connection with the employee joining the Company.

[2] The Company granted nonvested performance-based stock awards (restricted stock) outside its existing stock-based compensation plans in the first quarter of 2013 to one employee in connection with the employee joining the Company.

[3] The Company granted nonvested stock awards (restricted stock units) outside its existing stock-based compensation plans in the third quarter of 2012 to one employee in connection with the employee joining the Company.

[4] The Company granted non-qualified performance-based stock options outside its existing stock-based compensation plans in the first quarter of 2013 to one employee in connection with the employee joining the Company.