Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Summary of Adjustments to Quarterly Data Resulting from Adoption of New Standard

Income taxes - Upon adoption of this standard, all excess tax benefits and tax deficiencies (including tax benefits of dividends on share-based payment awards) are recognized as income tax expense or benefit in our consolidated statements of operations. The tax effects of exercised or vested awards are treated as discrete items in the reporting period in which they occur. Adoption of this new standard resulted in the recognition of an excess tax deficiency in our provision for income taxes rather than paid-in capital of $2.1 million for the year ended December 31, 2016 and affected our previously reported first quarter 2016 results as follows (in thousands, except per share data):

		For The Three Months Ended March 31, 2016
		As Reported			As Adjusted
Statements of Operations:
Income tax benefit	$	(44,038	)	$	(41,976	)
Net loss		(91,710	)		(93,772	)
Basic earnings per share		(0.55	)		(0.56	)
Diluted earnings per share		(0.55	)		(0.56	)

Statements of cash flows - The presentation requirements for cash flows related to employee taxes paid for withheld shares will be adjusted retrospectively. These cash flows have historically been presented as an operating activity. Upon adoption of this new standard, these cash outflows will be classified as a financing activity. Prior periods have been adjusted as follows (in thousands):

		As Reported		As Adjusted
		Net cash provided from operating activities		Net cash provided from operating activities
Year ended 2015	$	683,700	$	691,402
Year ended 2014		954,135		974,353
Year ended 2013		743,538		757,373
Three months ended March 31, 2016		87,424		90,785
Six months ended June 30, 2016		169,604		173,201
Nine months ended September 30, 2016		202,037		205,837

		As Reported			As Adjusted
		Net cash (used in) provided from financing activities			Net cash (used in) provided from financing activities
Year ended 2015	$	(464,905	)	$	(472,607	)
Year ended 2014		291,421			271,203
Year ended 2013		239,994			226,159
Three months ended March 31, 2016		(72,473	)		(75,834	)
Six months ended June 30, 2016		(95,411	)		(99,008	)
Nine months ended September 30, 2016		(35,229	)		(39,029	)