Quarterly Financial Data (unaudited) (Tables)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Schedule Of Quarterly Financial Data

	Quarter Ended
	March 31			June 30			September 30			December 31
2015
Revenues	$	432,338		$	449,137		$	455,470		$	442,204
Operating expenses
Direct cost of revenues		279,030			291,469			301,609			299,336
Selling, general and administrative expenses		102,214			109,045			105,058			116,351
Acquisition-related contingent consideration		234			(1,538	)		159			(55	)
Amortization of other intangible assets		3,012			3,007			2,900			2,807
		384,490			401,983			409,726			418,439
Operating income		47,848			47,154			45,744			23,765
Interest income and other		(137	)		950			2,027			392
Interest expense		(12,368	)		(12,473	)		(11,696	)		(6,231	)
Loss on early extinguishment of debt		—			—			(19,589	)		—
Income before income tax provision		35,343			35,631			16,486			17,926
Income tax provision		11,657			13,922			6,177			7,577
Net income	$	23,686		$	21,709		$	10,309		$	10,349
Earnings per common share — basic	$	0.59		$	0.53		$	0.25		$	0.25
Earnings per common share — diluted	$	0.57		$	0.52		$	0.25		$	0.25
Weighted average common shares outstanding
Basic		40,384			40,792			41,094			41,078
Diluted		41,324			41,696			41,982			41,879

	Quarter Ended
	March 31			June 30			September 30			December 31
2014
Revenues	$	425,552		$	454,324		$	451,178		$	425,158
Operating expenses
Direct cost of revenues		274,275			295,549			293,244			281,689
Selling, general and administrative expenses		108,387			107,032			102,461			115,965
Special charges		—			9,364			5,347			1,628
Acquisition-related contingent consideration		(1,843	)		(5	)		257			(85	)
Amortization of other intangible assets		4,616			3,452			3,398			4,055
		385,435			415,392			404,707			403,252
Operating income		40,117			38,932			46,471			21,906
Interest income and other		1,003			1,448			1,014			1,205
Interest expense		(12,655	)		(12,908	)		(12,634	)		(12,488	)
Income before income tax provision		28,465			27,472			34,851			10,623
Income tax provision		10,348			10,225			12,329			9,702
Net income	$	18,117		$	17,247		$	22,522		$	921
Earnings per common share — basic	$	0.46		$	0.43		$	0.57		$	0.02
Earnings per common share — diluted	$	0.45		$	0.42		$	0.55		$	0.02
Weighted average common shares outstanding
Basic		39,438			39,681			39,789			39,991
Diluted		40,457			40,750			40,819			41,090