Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Summary of Estimated Useful Lives of the Assets

Depreciation of property, plant and equipment is calculated using a combination of straight-line and accelerated methods over the estimated useful lives of the assets as follows:

Description	Useful Life
Land	—
Buildings and improvements	40 years
Equipment and software	3-5 years
Furniture and fixtures	7-10 years
Leasehold improvements	Shorter of lease term or estimated useful life

Summary of Changes in Goodwill

The following table summarizes changes in goodwill (in thousands):

Balance at December 31, 2012		1,559,607
2013 acquisitions		910
Adjustments to previous acquisitions		(202	)
Income tax benefit on rollover options exercised		(3,567	)
Effect of foreign currency translation		(15,362	)
Balance at December 31, 2013		1,541,386
2014 acquisition		66,511
Effect of foreign currency translation		(34,670	)
Balance at December 31, 2014	$	1,573,227

Summary of the Components of Intangible Assets

A summary of the components of intangible assets is as follows (in thousands):

	December 31,
	2014			2013
Customer relationships	$	604,638		$	599,186
Completed technology		154,043			122,758
Trade names		39,876			36,072
Other		2,774			2,887
		801,331			760,903
Less: accumulated amortization		(412,897	)		(336,712	)
	$	388,434		$	424,191

Schedule of Estimated Amortization Expense, Related to Intangible Assets

Total estimated amortization expense, related to intangible assets, for each of the next five years, as of December 31, 2014, is expected to approximate (in thousands):

Year Ending December 31,
2015	$	87,466
2016		78,591
2017		60,187
2018		53,906
2019		44,041
	$	324,191

Computation of Basic and Diluted EPS

The following table sets forth the weighted average common shares used in the computation of basic and diluted EPS (in thousands):

	Year Ended December 31,
	2014		2013		2012
Weighted average common shares outstanding — used in calculation of basic EPS		83,314		81,195		78,321
Weighted average common stock equivalents — options and restricted shares		4,017		4,421		4,567
Weighted average common and common equivalent shares outstanding — used in calculation of diluted EPS		87,331		85,616		82,888