Earnings Per Common Share (Tables)

12 Months Ended

Dec. 31, 2015

Earnings Per Share [Abstract]

Computation of Basic and Diluted Net Earnings Per Share

The computations of basic net earnings per share and diluted net earnings per share for 2015, 2014 and 2013 are as follows:

	Year ended December 31, 2015
	Income (Numerator)		Shares (Denominator)	Per-share Amount
Net income	$	58,024,000
Basic earnings per common share	$	58,024,000	71,826,000	$	0.81
Effect of dilutive securities:
Stock options and unvested restricted stock			686,000	(0.01		)
Diluted earnings per common share	$	58,024,000	72,512,000	$	0.80
	Year ended December 31, 2014
	Income (Numerator)		Shares (Denominator)	Per-share Amount
Net income	$	21,850,000
Basic earnings per common share	$	21,850,000	70,616,000	$	0.31
Effect of dilutive securities:
Stock options and unvested restricted stock			725,000	—
Diluted earnings per common share	$	21,850,000	71,341,000	$	0.31
	Year ended December 31, 2013
	Income (Numerator)		Shares (Denominator)	Per-share Amount
Net income	$	47,129,000
Basic earnings per common share	$	47,129,000	69,206,000	$	0.68
Effect of dilutive securities:
Stock options and unvested restricted stock			839,000	(0.01		)
Diluted earnings per common share	$	47,129,000	70,045,000	$	0.67