Quarterly Financial Data (unaudited) (Tables)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Schedule Of Quarterly Financial Data

	Quarter Ended
	March 31			June 30			September 30			December 31
2019
Revenues	$	551,274		$	606,119		$	593,106		$	602,218
Operating expenses
Direct cost of revenues	349,066			386,266			380,892			418,672
Selling, general and administrative expenses	113,185			129,906			127,951			133,032
Amortization of other intangible assets	1,861			1,852			2,125			2,314
	464,112			518,024			510,968			554,018
Operating income	87,162			88,095			82,138			48,200
Interest income and other	159			2,609			2,973			(3,680		)
Interest expense	(4,746		)	(4,793		)	(4,832		)	(4,835		)
Income before income tax provision	82,575			85,911			80,279			39,685
Income tax provision	19,930			21,313			19,857			10,624
Net income	$	62,645		$	64,598		$	60,422		$	29,061
Earnings per common share — basic (1)	$	1.69		$	1.75		$	1.65		$	0.80
Earnings per common share — diluted (1)	$	1.64		$	1.69		$	1.59		$	0.76
Weighted average common shares outstanding
Basic	36,981			36,960			36,617			36,545
Diluted	38,219			38,168			37,938			38,126

	Quarter Ended
	March 31			June 30			September 30			December 31
2018
Revenues	$	497,774		$	512,098		$	513,012		$	504,993
Operating expenses
Direct cost of revenues	321,117			330,318			336,477			340,162
Selling, general and administrative expenses	112,128			117,897			117,448			118,163
Amortization of other intangible assets	2,270			2,052			1,975			1,865
	435,515			450,267			455,900			460,190
Operating income	62,259			61,831			57,112			44,803
Interest income and other	(1,800		)	2,474			1,400			2,903
Interest expense	(6,244		)	(6,583		)	(7,246		)	(7,076		)
Gain on sale of business	—			—			13,031			—
Loss on early extinguishment of debt	—			—			—			(9,072		)
Income before income tax provision	54,215			57,722			64,297			31,558
Income tax provision	15,270			14,113			19,964			7,834
Net income	$	38,945		$	43,609		$	44,333		$	23,724
Earnings per common share — basic (1)	$	1.06		$	1.18		$	1.19		$	0.63
Earnings per common share — diluted (1)	$	1.04		$	1.14		$	1.14		$	0.61
Weighted average common shares outstanding
Basic	36,700			37,001			37,318			37,368
Diluted	37,612			38,271			38,756			38,628

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The sum of the quarterly earnings per share amounts may not equal the annual amounts due to changes in the weighted average number of common shares outstanding during each quarterly period.