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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended
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Jul. 31, 2015 Segment | Jul. 01, 2015 shares | Aug. 31, 2015 | Mar. 31, 2015 Segment | Sep. 30, 2014 USD ($) | Dec. 31, 2013 USD ($) | Jun. 30, 2015 USD ($) | Dec. 31, 2015 USD ($) Customer Segment | Dec. 31, 2014 USD ($) Customer Segment | Dec. 31, 2013 USD ($) Customer
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Tax benefit |  |  |  |  |  |  |  | $ (53,820,000) | $ (9,271,000) | $ 3,241,000
Restricted cash and cash equivalents |  |  |  |  |  |  |  | 4,073,000 | 0 |
Inventory, capitalized expenses |  |  |  |  |  |  |  | 0 | 0 |
Depreciation expense |  |  |  |  |  |  |  | 27,000,000 | 23,700,000 | 19,900,000
Interest expense capitalized to property, plant, and equipment |  |  |  |  |  |  |  | $ 1,700,000 | $ 2,600,000 |
Number of reportable segments | Segment | 3 |  |  | 3 |  |  |  | 2 | 5 |
Number of reportable segments, goodwill reallocated | Segment |  |  |  |  |  |  |  | 4 |  |
Goodwill, impairment loss |  |  |  |  |  |  |  | $ 0 |  |
Impairment of indefinite-lived Assets |  |  |  |  |  |  | $ 0 |  |  |
Amortization expense |  |  |  |  |  |  |  | 32,200,000 | $ 22,700,000 | 11,200,000
Annual amortization expense expected to approximate in 2015 |  |  |  |  |  |  |  | 42,200,000 |  |
Annual amortization expense expected to approximate in 2016 |  |  |  |  |  |  |  | 41,500,000 |  |
Annual amortization expense expected to approximate in 2017 |  |  |  |  |  |  |  | 40,700,000 |  |
Annual amortization expense expected to approximate in 2018 |  |  |  |  |  |  |  | 40,600,000 |  |
Annual amortization expense expected to approximate in 2019 |  |  |  |  |  |  |  | 40,500,000 |  |
Charitable contributions |  |  |  |  |  |  |  | 900,000 | 600,000 | 600,000
Undistributed earnings of foreign subsidiaries |  |  |  |  |  |  |  | 261,300,000 |  |
Amount of unrecognized deferred tax liability |  |  |  |  |  |  |  | 37,900,000 |  |
Distribution and handling costs |  |  |  |  |  |  |  | $ 13,700,000 | 13,200,000 | 12,800,000
Extended warranties, in years |  |  |  |  |  |  |  | 2 years |  |
Accrued warranty expense |  |  |  |  |  |  |  | $ 800,000 | 300,000 |
Defined benefit plan, contributions by employer |  |  |  |  |  |  |  | 1,800,000 |  |
Defined benefit plan, recognized net gain (loss) due to settlements and curtailments |  |  |  |  |  |  |  | (5,600,000) |  |
Pension contributions |  |  |  |  |  |  |  | 2,200,000 | 900,000 | 800,000
Interest paid |  |  |  |  |  |  |  | 12,700,000 | 10,900,000 | 9,500,000
Interest paid, capitalized |  |  |  |  |  |  |  | 1,700,000 | 2,600,000 | 3,200,000
Income taxes paid |  |  |  |  |  |  |  | 21,300,000 | 6,800,000 | 3,700,000
Capital expenditures incurred but not yet paid |  |  |  |  |  |  |  | 4,700,000 | 3,300,000 | 8,100,000
In-process research and development |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Other Indefinite-lived intangible assets |  |  |  |  |  |  |  | 1,000,000 | 1,400,000 |
Impairment charges |  |  |  |  |  |  |  | $ 400,000 | $ 200,000 | 400,000
Trademarks Brand Names |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Finite-lived intangible asset, useful life |  |  |  |  |  |  |  | 30 years | 34 years |
Technology |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Amortization expense, included in cost of product revenues |  |  |  |  |  |  |  | $ 22,300,000 | $ 15,900,000 | $ 4,100,000
Computer Equipment |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Capital leased assets, gross |  |  |  |  |  |  |  | 2,000,000 |  |
Capital leases, lessee balance sheet, assets by major class, accumulated depreciation |  |  |  |  |  |  |  | $ 1,300,000 | $ 700,000 |
Out-of-period Adjustment |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Tax benefit |  |  |  |  |  | $ 1,000,000 |  |  |  |
Sales Revenue, Net |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Concentration risk, percentage |  |  |  |  |  |  |  | 10.00% | 10.00% | 10.00%
Concentration risk, number of customers over benchmark | Customer |  |  |  |  |  |  |  | 0 | 0 | 0
Deferred tax accounts in 2011 error | Out-of-period Adjustment |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Tax benefit |  |  |  |  |  | $ 900,000 |  |  |  |
Confluent Surgical, Inc. |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Impairment of finite-lived assets |  |  |  |  | $ 600,000 |  |  | $ 600,000 |  |
SeaSpine Inc. | Discontinued Operations, Disposed of by Means Other than Sale, Spinoff |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Disposal group, including discontinued operation, distribution of spinoff shares, percent |  | 100.00% |  |  |  |  |  |  |  |
Disposal group, including discontinued operation, shares required for issuance of spinoff share | shares |  | 3 |  |  |  |  |  |  |  |
Minimum | Trademarks Brand Names |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Finite-lived intangible asset, useful life |  |  | 20 years |  |  |  |  |  |  |
Maximum | Trademarks Brand Names |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Finite-lived intangible asset, useful life |  |  | 30 years |  |  |  |  |  |  |

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