Net Income Per Share (Tables)

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Reconciliation of Basic and Diluted Net Income Per Share

The following table reconciles basic and diluted net income per share for the years indicated:

	2017					2016					2015
			Weighted-Average Shares					Weighted-Average Shares					Weighted-Average Shares
Basic net income per share:
Net income available to common stockholders	$	96,070	45,181,221	$	2.13	$	81,051	40,767,343	$	1.99	$	65,384	37,816,399	$	1.73
Effect of dilutive stock options and restricted stock awards			221,757					245,790					271,834
Diluted net income per share:
Net income available to common stockholders	$	96,070	45,402,978	$	2.12	$	81,051	41,013,133	$	1.98	$	65,384	38,088,233	$	1.72