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Earnings Per Share (Detail) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Schedule of Diluted shares        
Basic weighted average common stock issued and outstanding 58,392,240 57,304,763 58,226,687 57,040,166
Dilutive options and restricted stock   563,540   535,139
Total diluted shares 58,392,240 57,868,303 58,226,687 57,575,305
Stock options excluded from dilutive calculation because they would be anti-dilutive 5,766,411 1,203,324 5,979,348 2,364,392