Stock-Based Compensation (Details Textual) (USD $) In Millions, except Share data, unless otherwise specified	9 Months Ended	3 Months Ended		9 Months Ended							3 Months Ended		9 Months Ended				0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended
	Sep. 30, 2014 compensation_plan	Sep. 30, 2014 The Plans [Member]	Sep. 30, 2013 The Plans [Member]	Sep. 30, 2014 The Plans [Member]	Sep. 30, 2013 The Plans [Member]	Sep. 30, 2014 Employee Group [Member] 2008 Equity Incentive Plan [Member]		Sep. 30, 2013 Employee Group [Member] 2008 Equity Incentive Plan [Member]	Sep. 30, 2014 Director Group [Member] 2008 Equity Incentive Plan [Member]	Sep. 30, 2013 Director Group [Member] 2008 Equity Incentive Plan [Member]	Mar. 31, 2013 Employee Inducement [Member] 2008 Equity Incentive Plan [Member] employee		Sep. 30, 2014 Employee Inducement [Member] 2008 Equity Incentive Plan [Member] employee		Sep. 30, 2013 Employee Inducement [Member] 2008 Equity Incentive Plan [Member]		Jun. 19, 2012 Performance Shares [Member] 2006 Management Incentive Plan [Member] officer	Sep. 30, 2014 Performance Shares [Member] 2006 Management Incentive Plan [Member] executive_officer	Jun. 30, 2013 Performance Shares [Member] 2006 Management Incentive Plan [Member]	Sep. 30, 2014 Performance Shares [Member] 2006 Management Incentive Plan [Member]	Sep. 30, 2014 Restricted Stock and Restricted Stock Units [Member] 2008 Equity Incentive Plan [Member]	Sep. 30, 2014 Restricted Stock and Restricted Stock Units [Member] Employee Group [Member]	Sep. 30, 2014 Restricted Stock and Restricted Stock Units [Member] Employee Group [Member] 2008 Equity Incentive Plan [Member]	Sep. 30, 2013 Restricted Stock and Restricted Stock Units [Member] Employee Group [Member] 2008 Equity Incentive Plan [Member]	Sep. 30, 2014 Restricted Stock and Restricted Stock Units [Member] Director Group [Member]	Sep. 30, 2014 Restricted Stock and Restricted Stock Units [Member] Director Group [Member] 2008 Equity Incentive Plan [Member]	Sep. 30, 2013 Restricted Stock and Restricted Stock Units [Member] Director Group [Member] 2008 Equity Incentive Plan [Member]	Sep. 30, 2014 Restricted Stock and Restricted Stock Units [Member] Employee Inducement [Member] 2008 Equity Incentive Plan [Member] employee		Sep. 30, 2013 Restricted Stock and Restricted Stock Units [Member] Employee Inducement [Member] 2008 Equity Incentive Plan [Member] employee		Sep. 30, 2014 Stock Options [Member] 2008 Equity Incentive Plan [Member]	Sep. 30, 2014 Stock Options [Member] 2008 Equity Incentive Plan [Member] Minimum [Member]	Sep. 30, 2014 Stock Options [Member] 2008 Equity Incentive Plan [Member] Maximum [Member]	Sep. 30, 2014 Stock Options [Member] Employee Group [Member]	Sep. 30, 2014 Stock Options [Member] Director Group [Member]	Sep. 30, 2014 Year One [Member] Employee Group [Member] 2008 Equity Incentive Plan [Member]		Sep. 30, 2014 Year One [Member] Employee Group [Member] Employee Inducement [Member]		Sep. 30, 2014 Year Two [Member] Employee Group [Member] 2008 Equity Incentive Plan [Member]		Sep. 30, 2014 Year Two [Member] Employee Group [Member] Employee Inducement [Member]		Sep. 30, 2014 Year Three [Member] Employee Group [Member] 2008 Equity Incentive Plan [Member]		Sep. 30, 2014 Year Three [Member] Employee Group [Member] Employee Inducement [Member]
Stock-Based Compensation (Textual) [Abstract]
Number of shares granted																							120,000	449,875		51,276	75,490	70,000	[1]	20,000	[2]
Number of stock-based compensation plans	3
Stock options expiration period																																	6 years	7 years
Stock options vesting period						3 years	[3]	3 years					3 years	[4]	3 years	[5]	3 years					3 years	3 years	3 years	1 year			3 years	[1]	3 years	[2]				3 years	1 year
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 stock options granted (shares)											1	[5]	2	[4]														2	[1]	1	[2]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price						$ 6.99	[3]	$ 5.58	$ 6.45	$ 5.67			$ 6.64	[4]	$ 7.14	[5]																					$ 6.36	[3]	$ 6.04	[4]	$ 6.99	[3]	$ 6.64	[4]	$ 7.63	[3]	$ 7.24	[4]
Number of officers																	7
Total of performance units were outstanding and fully vested (shares)																	154,264	16,530		16,530
Grant date fair value awards																	$ 1.2
Percentage of performance units (percent)																				60.00%
Percentage of fair market value (percent)																				40.00%
Performance units settled in period (shares)																		121,210	52,334	27,546
Common stock issued during period (shares)																		69,438	31,399	16,526
Cash payments for shares settled during period																		0.3	0.1	0.1
Number of executive officers that settled performance units in period (executive officers)																		3
Number of former executive officers that settled performance units in period (executive officers)																		3
Performance units forfeited in period (shares)																		16,524
Number of former executive officers that forfeited performance units in period (executive officer)																		1
Selling, general and administrative expenses		1.4	1.3	3.4	3.8
Unrecognized stock-based compensation expense related to stock options		$ 6.7		$ 6.7
Weighted-average period for recognizing stock compensation expense				2 years 0 months 84 days

[1] The Company granted nonvested stock awards (restricted stock) outside its existing stock-based compensation plans in the third quarter of 2014 to two executive officers in connection with the employees 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 weighted average exercise price for these options is calculated based on an exercise price of $6.36 for the options that vest on June 27, 2015, $6.99 for the options that vest on June 27, 2016 and $7.63 for the options that vest on June 27, 2017.

[4] The Company granted non-qualified stock options outside its existing stock-based compensation plans in the third quarter of 2014 to two executive officers in connection with the employees joining the Company. The weighted average exercise price for these options is calculated based on an exercise price of $6.04 for the options that vest on September 11, 2015, $6.64 for the options that vest on

[5] 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.