Selected Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Selected Quarterly Financial Data (Unaudited)



Fiscal Quarters Year Ended December 31, 2017	First		Second		Third		Fourth
Revenues, net	$	520,433	$	541,237	$	577,877	$	609,991
Operating income	195,068		216,043		232,637		240,012
Net income	123,693		130,987		202,823		282,697
Basic earnings per share	$	1.34	$	1.42	$	2.23	$	3.15
Diluted earnings per share	1.31		1.39		2.18		3.05
Weighted average shares outstanding:
Basic shares	92,108		92,013		90,751		89,676
Diluted shares	94,560		94,223		93,001		92,623



Fiscal Quarters Year Ended December 31, 2016*	First		Second		Third		Fourth
Revenues, net	$	414,262	$	417,905	$	484,426	$	514,953
Operating income	175,955		171,168		191,055		215,975
Net income	111,090		116,253		129,618		95,424
Earnings per share:
Basic earnings per share	$	1.20	$	1.25	$	1.40	$	1.03
Diluted earnings per share	1.17		1.22		1.36		1.00
Weighted average shares outstanding:
Basic shares	92,516		92,665		92,631		92,574
Diluted shares	95,030		95,279		95,307		95,235

*2016 quarterly amounts reflect the impact of the Company's adoption of Accounting Standards Update 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payments Accounting, to simplify several aspects of the accounting for share-based compensation, including the income tax consequences.

The sum of the quarterly earnings per common share amounts for 2017 and 2016 may not equal the earnings per common share for the 2017 and 2016 due to rounding.

The fourth quarter of 2017 includes the provisional net tax benefit of $128.2 million as a result of the Tax Act and $11 million of incremental legal fees.

The fourth quarter of 2016 includes a $36.1 million impairment charge related to the Company’s minority investment in Masternaut, partially offset by a $31.8 million decrease in non-cash stock based compensation expense.