Goodwill and Other Intangible Assets | 7. Goodwill and Other Intangible Assets The carrying value of goodwill by segment was as follows (in thousands): Medical & RF Technology Industrial Energy Systems Total Balances at December 31, 2016 $ 3,185,071 $ 4,687,670 $ 363,978 $ 410,423 $ 8,647,142 Additions - - - 19,169 19,169 Other 3,264 19,313 - - 22,577 Currency translation adjustments 8,986 9,936 8,129 4,286 31,337 Balances at June 30, 2017 $ 3,197,321 $ 4,716,919 $ 372,107 $ 433,878 $ 8,720,225 Other relates primarily to tax purchase accounting, intangible valuations and working capital adjustments for 2016 acquisitions. Other intangible assets were comprised of (in thousands): Cost Accumulated amortization Net book value Assets subject to amortization: Customer related intangibles $ 3,272,081 $ (712,718 ) $ 2,559,363 Unpatented technology 462,152 (144,025 ) 318,127 Software 184,761 (56,882 ) 127,879 Patents and other protective rights 24,656 (20,399 ) 4,257 Trade names 6,591 (653 ) 5,938 Assets not subject to amortization: Trade names 578,279 - 578,279 In process research and development 62,000 - 62,000 Balances at December 31, 2016 $ 4,590,520 $ (934,677 ) $ 3,655,843 Assets subject to amortization: Customer related intangibles $ 3,285,128 $ (810,244 ) $ 2,474,884 Unpatented technology 531,554 (175,549 ) 356,005 Software 185,019 (70,847 ) 114,172 Patents and other protective rights 25,279 (21,156 ) 4,123 Trade names 6,613 (1,192 ) 5,421 Assets not subject to amortization: Trade names 582,625 - 582,625 In process research and development 1,369 - 1,369 Balances at June 30, 2017 $ 4,617,587 $ (1,078,988 ) $ 3,538,599 Amortization expense of other intangible assets was $146,549 and $98,745 during the six months ended June 30, 2017 and 2016, respectively. An evaluation of the carrying value of goodwill and indefinite-lived intangibles is required to be performed on an annual basis and on an interim basis if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying value. There have been no events or changes in circumstances which indicate an interim impairment review is required in 2017. The Company expects to perform the annual analysis during the fourth quarter of 2017. |