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Earnings per Common Share (Tables)

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Earnings Per Common Share

The calculation of basic and diluted EPS was as follows:

	Three Months Ended June 30,								Six Months Ended June 30,
	2018				2017				2018				2017
	(In thousands, except per share data)
Basic earnings per Class A common share
Numerator:
Net income	$	29,827			$	19,266			$	99,858			$	60,020
Denominator:
Weighted-average Class A shares issued and outstanding	52,105				50,013				51,774				50,234
Basic earnings per Class A common share	$	0.57			$	0.39			$	1.93			$	1.19
Diluted earnings per Class A common share
Numerator:
Net income	$	29,827			$	19,266			$	99,858			$	60,020
Denominator:
Weighted-average Class A shares issued and outstanding	52,105				50,013				51,774				50,234
Dilutive potential common shares:
Stock options	343				759				441				706
Restricted stock units	1,236				1,418				1,296				1,368
Performance based restricted stock units	705				259				789				268
Employee stock purchase plan	1				3				1				1
Diluted weighted-average Class A shares issued and outstanding	54,390				52,452				54,301				52,577
Diluted earnings per Class A common share	$	0.55			$	0.37			$	1.84			$	1.14

Antidilutive Shares

The following table shows the weighted-average number of shares excluded from the diluted EPS calculation:

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
	(In thousands)
Class A common stock
Options to purchase Class A common stock	—			56			—			73
Performance based restricted stock units	134			424			101			216
Total options and restricted stock units	134			480			101			289

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- References

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- Definition

Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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- Definition

Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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