Segment Information - Information By Segment (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Total revenues	$ 587,044,000	$ 595,962,000	$ 585,890,000	$ 607,221,000	$ 550,776,000	$ 486,747,000	$ 503,082,000	$ 477,592,000	$ 2,376,117,000	$ 2,018,197,000	$ 2,013,186,000
Gross profit	$ 176,790,000	$ 197,097,000	$ 176,577,000	$ 179,855,000	$ 175,082,000	$ 165,755,000	$ 178,277,000	$ 157,637,000	730,319,000	676,751,000	662,532,000
Operating Income (Loss)									(49,692,000)	154,877,000	100,993,000
Total other income (expense)									(59,459,000)	(20,302,000)	(16,366,000)
Income (loss) before income taxes									(109,151,000)	134,575,000	84,627,000
Depreciation and amortization									122,497,000	63,215,000	68,318,000
Device Solutions [Member]
Segment Reporting Information [Line Items]
Total revenues									933,365,000	882,896,000	913,521,000
Gross profit									187,254,000	216,631,000	232,896,000
Operating Income (Loss)									130,988,000	159,641,000	178,161,000
Depreciation and amortization									25,022,000	25,757,000	25,158,000
Networked Solutions Segment [Member]
Segment Reporting Information [Line Items]
Total revenues									1,224,144,000	947,384,000	939,681,000
Gross profit									482,471,000	412,375,000	378,382,000
Operating Income (Loss)									360,779,000	322,367,000	291,235,000
Depreciation and amortization									12,671,000	7,758,000	9,137,000
Outcomes Segment [Member]
Segment Reporting Information [Line Items]
Total revenues									218,608,000	187,917,000	159,984,000
Gross profit									60,594,000	47,745,000	51,254,000
Operating Income (Loss)									16,634,000	4,915,000	16,239,000
Depreciation and amortization									6,572,000	3,826,000	3,041,000
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)									(558,093,000)	(332,046,000)	(384,642,000)
Depreciation and amortization									78,232,000	25,874,000	30,982,000
Product [Member]
Segment Reporting Information [Line Items]
Total revenues									2,095,458,000	1,813,925,000	1,830,070,000
Product [Member] | Device Solutions [Member]
Segment Reporting Information [Line Items]
Total revenues									916,809,000	866,028,000	894,583,000
Product [Member] | Networked Solutions Segment [Member]
Segment Reporting Information [Line Items]
Total revenues									1,133,919,000	881,042,000	882,097,000
Product [Member] | Outcomes Segment [Member]
Segment Reporting Information [Line Items]
Total revenues									44,730,000	66,855,000	53,390,000
Service [Member]
Segment Reporting Information [Line Items]
Total revenues									280,659,000	204,272,000	183,116,000
Service [Member] | Device Solutions [Member]
Segment Reporting Information [Line Items]
Total revenues									16,556,000	16,868,000	18,938,000
Service [Member] | Networked Solutions Segment [Member]
Segment Reporting Information [Line Items]
Total revenues									90,225,000	66,342,000	57,584,000
Service [Member] | Outcomes Segment [Member]
Segment Reporting Information [Line Items]
Total revenues									$ 173,878,000	$ 121,062,000	$ 106,594,000