Stockholders' Equity and Stock Based Compensation (Details 3) (2006 Plan and 2012 Plan, Restricted stock, USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013
2006 Plan and 2012 Plan | Restricted stock
Shares
Nonvested shares at the beginning of the period	162,609
Granted (in shares)	44,000		98,689	56,500
Vested (in shares)	(19,887)
Forfeited (in shares)			(34,487)	(775)
Nonvested shares at the end of the period	186,722		162,609
Weighted Average Grant Date Fair Value
Nonvested shares at the beginning of period (in dollars per share)	$ 14.36
Granted (in dollars per share)	$ 14.99
Vested (in dollars per share)	$ 13.67
Nonvested shares at the end of period (in dollars per share)	$ 14.15		$ 14.36
Unrecognized compensation cost (in dollars)	$ 2.6
Weighted average period for recognition of unrecognized compensation cost	3 years
Share-based compensation cost (in dollars)	$ 0.3	$ 0.3