Discontinued Operations (Details) - USD ($) $ in Thousands			3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 22, 2015	Jan. 31, 2015	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Gain (loss) from discontinued operation, Net of Tax			$ 10,634			$ 10,634
Income tax expense on sale of discontinuing operations			3,954			3,954
Stock based compensation expense of discontinued operations						4,046
Assets [Abstract]
Cash and cash equivalents								$ 4,769
Accounts receivable								7,095
Inventories								2,389
Deferred tax assets								1,930
Other current assets								2,761
Property & Equipment, net								14,519
Goodwill, net								6,491
Other intangible assets, net								38,331
Other assets								1,207
Current assets held for sale								79,492
Less: Impairment								(1,507)
Current assets held for sale, net			0			0		77,985
Property & Equipment, net								12,391
Goodwill, net								3,142
Patents and licensed technologies, net								4,859
Other intangible assets, net								2,574
Other assets								40
Long term assets held for sale								23,006
Liabilities [Abstract]
Accounts payable								7,295
Other accrued liabilities								6,742
Deferred revenues								237
Long term debt								1,080
Other liabilities								6,870
Deferred tax liability								14,999
Current liabilities held for sale			0			0		37,223
Long term debt								82
Other liabilities								96
Long term liabilities held for sale			0			0		178
Total net assets of discontinued operations								63,590
XTRAC and VTRAC Business [Member]
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Cash consideration from sale of business	$ 42,500
Net proceeds from sale of business	$ 41,000
Gain (loss) from discontinued operation, Net of Tax			(2,058)		$ 509	(5,042)	$ 1,877
Revenues from discontinued operations			7,192		$ 7,178	14,669	$ 13,239
Interest expense from discontinued operations			395			2,289
Stock based compensation expense of discontinued operations			1,609			1,684
Assets [Abstract]
Cash and cash equivalents								255
Accounts receivable								4,336
Inventories								2,270
Deferred tax assets								0
Other current assets								269
Property & Equipment, net								0
Goodwill, net								0
Other intangible assets, net								0
Other assets								0
Current assets held for sale								7,130
Less: Impairment								0
Current assets held for sale, net								7,130
Property & Equipment, net								12,391
Goodwill, net								3,142
Patents and licensed technologies, net								4,859
Other intangible assets, net								2,574
Other assets								40
Long term assets held for sale								23,006
Liabilities [Abstract]
Accounts payable								1,777
Other accrued liabilities								809
Deferred revenues								140
Long term debt								0
Other liabilities								0
Deferred tax liability								0
Current liabilities held for sale								2,726
Long term debt								82
Other liabilities								96
Long term liabilities held for sale								178
Total net assets of discontinued operations								27,232
LCA-Vision [Member]
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Cash consideration from sale of business		$ 40,000
Net proceeds from sale of business		$ 37,700
Gain (loss) from discontinued operation, Net of Tax			$ (1,667)					(44,598)
Revenues from discontinued operations				$ 9,158
Stock based compensation expense of discontinued operations				$ 2,363
Percentage of shares sold for wholly-owned subsidiary (in hundredths)		100.00%
Decrease in the implied fair value of goodwill						$ 41,000		43,091
Assets [Abstract]
Cash and cash equivalents								4,514
Accounts receivable								2,759
Inventories								119
Deferred tax assets								1,930
Other current assets								2,492
Property & Equipment, net								14,519
Goodwill, net								6,491
Other intangible assets, net								38,331
Other assets								1,207
Current assets held for sale								72,362
Less: Impairment								(1,507)
Current assets held for sale, net								70,855
Property & Equipment, net								0
Goodwill, net								0
Patents and licensed technologies, net								0
Other intangible assets, net								0
Other assets								0
Long term assets held for sale								0
Liabilities [Abstract]
Accounts payable								5,518
Other accrued liabilities								5,933
Deferred revenues								97
Long term debt								1,080
Other liabilities								6,870
Deferred tax liability								14,999
Current liabilities held for sale								34,497
Long term debt								0
Other liabilities								0
Long term liabilities held for sale								0
Total net assets of discontinued operations								$ 36,358