Goodwill and Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Changes in carrying amount of goodwill [Abstract]
Balance, beginning of period		$ 214,312	$ 209,829
Increase due to acquisitions			4,431
Increase due to foreign currency		62	52
Allocation in operating segments			0
Balance, end of period	214,312	214,374	214,312	209,829
Other Intangible Assets [Abstract]
Gross carrying amount	93,526	94,118	93,526
Accumulated amortization	38,891	53,036	38,891
Impairment expense	3,872
Estimated aggregate amortization expense [Abstract]
2014		12,378
2015		9,864
2016		7,819
2017		5,637
2018		3,402
Thereafter		1,982
Total		41,082
Amortization included in cost of sales and operating expenses [Abstract]
Total amortization and impairment		14,126	16,544	18,253
Amortization included in cost of sales [Member]
Other Intangible Assets [Abstract]
Amortization of intangible assets		5,787	7,917	8,849
Amortization included in cost of sales and operating expenses [Abstract]
Total amortization		5,787	7,917	8,849
Amortization included in operating expenses [Member]
Other Intangible Assets [Abstract]
Amortization of intangible assets		8,339	8,627	9,404
Amortization included in cost of sales and operating expenses [Abstract]
Total amortization		8,339	8,627	9,404
Purchased Software [Member]
Other Intangible Assets [Abstract]
Weighted-average remaining amortization period (years)		3 years 9 months 18 days
Gross carrying amount	31,066	31,542	31,066
Accumulated amortization	12,350	16,885	12,350
Gross intangible assets acquired			780
Impairment expense	796
Amortization of intangible assets			1,110
Amortization included in cost of sales and operating expenses [Abstract]
Total amortization			1,110
Purchased Software [Member] | Amortization included in cost of sales [Member]
Other Intangible Assets [Abstract]
Amortization of intangible assets		4,525	5,501	4,915
Amortization included in cost of sales and operating expenses [Abstract]
Total amortization		4,525	5,501	4,915
Capitalized Software [Member]
Other Intangible Assets [Abstract]
Weighted-average remaining amortization period (years)		2 years 6 months
Gross carrying amount	1,825	1,910	1,825
Accumulated amortization	1,534	1,685	1,534
Capitalized Software [Member] | Amortization included in cost of sales [Member]
Other Intangible Assets [Abstract]
Amortization of intangible assets		152	205	189
Amortization included in cost of sales and operating expenses [Abstract]
Total amortization		152	205	189
Customer Relationships [Member]
Other Intangible Assets [Abstract]
Weighted-average remaining amortization period (years)		5 years 3 months 18 days
Gross carrying amount	46,302	46,333	46,302
Accumulated amortization	15,012	22,740	15,012
Gross intangible assets acquired			1,220
Customer Relationships [Member] | Amortization included in operating expenses [Member]
Other Intangible Assets [Abstract]
Amortization of intangible assets		7,719	7,434	5,667
Amortization included in cost of sales and operating expenses [Abstract]
Total amortization		7,719	7,434	5,667
Backlog [Member]
Other Intangible Assets [Abstract]
Weighted-average remaining amortization period (years)		1 year
Gross carrying amount	9,680	9,680	9,680
Accumulated amortization	8,338	9,448	8,338
Backlog [Member] | Amortization included in cost of sales [Member]
Other Intangible Assets [Abstract]
Amortization of intangible assets		1,110	2,211	3,745
Amortization included in cost of sales and operating expenses [Abstract]
Total amortization		1,110	2,211	3,745
Trade Names [Member]
Other Intangible Assets [Abstract]
Weighted-average remaining amortization period (years)		6 years 10 months 24 days
Gross carrying amount	1,463	1,463	1,463
Accumulated amortization	446	605	446
Gross intangible assets acquired			80
Impairment expense	474
Amortization of intangible assets			620
Amortization included in cost of sales and operating expenses [Abstract]
Total amortization			620
Trade Names [Member] | Amortization included in operating expenses [Member]
Other Intangible Assets [Abstract]
Amortization of intangible assets		159	732	3,241
Amortization included in cost of sales and operating expenses [Abstract]
Total amortization		159	732	3,241
Non-competes [Member]
Other Intangible Assets [Abstract]
Weighted-average remaining amortization period (years)		3 years 3 months 18 days
Gross carrying amount	3,190	3,190	3,190
Accumulated amortization	1,211	1,673	1,211
Non-competes [Member] | Amortization included in operating expenses [Member]
Other Intangible Assets [Abstract]
Amortization of intangible assets		461	461	496
Amortization included in cost of sales and operating expenses [Abstract]
Total amortization		461	461	496
Healthcare [Member]
Changes in carrying amount of goodwill [Abstract]
Balance, beginning of period		194,115	0
Increase due to acquisitions			0
Increase due to foreign currency		0	0
Allocation in operating segments			194,115
Balance, end of period	194,115	194,115	194,115
DNA [Member]
Changes in carrying amount of goodwill [Abstract]
Balance, beginning of period		20,197	0
Increase due to acquisitions			0
Increase due to foreign currency		62	52
Allocation in operating segments			20,145
Balance, end of period	$ 20,197	$ 20,259	$ 20,197