NET INCOME PER SHARE (Tables)

6 Months Ended

Jun. 30, 2017

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The calculation of basic and diluted net income per share is determined using net income applicable to common stockholders as the numerator and the number of shares included in the denominator as follows (in thousands, except per share amounts):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2017		2016		2017		2016
Basic net income per share:
Net income applicable to common stockholders	$	22,945	$	35,531	$	43,118	$	63,055
Weighted average common shares outstanding		59,902		64,834		60,022		64,936
Basic net income per share	$	0.38	$	0.55	$	0.72	$	0.97
Diluted net income per share:
Net income applicable to common stockholders	$	22,945	$	35,531	$	43,118	$	63,055
Weighted average common shares outstanding		59,902		64,834		60,022		64,936
Dilutive shares from assumed conversion of convertible senior notes		1,831		1,057		1,762		529
Dilutive stock options and restricted stock		1,474		1,224		1,519		1,205
Diluted weighted average common shares outstanding		63,207		67,115		63,303		66,670
Diluted net income per share	$	0.36	$	0.53	$	0.68	$	0.95