Earnings per Share (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Weighted average number of shares for calculation of basic EPS – Common Stock	35,360,957	32,658,311	35,213,135	33,698,083
Stock option under the 2006, 2011 and 2013 Equity Incentive Plans	732,643	508,917	628,093	445,175
Weighted average number of shares for calculation of diluted EPS	36,093,600	33,167,228	35,841,228	34,143,258
Common stock that have been excluded from the diluted shares calculation		502,953		502,953
Stock options outstanding under the 2006, 2011 and 2013 Equity Incentive Plans
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common stock that have been excluded from the diluted shares calculation		58,000		58,000
Series C Convertible Preferred Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common stock that have been excluded from the diluted shares calculation		444,953		444,953