Write Downs and Other Charges (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Write Downs And Other Charges [Line Items]
Write downs and other charges	$ 7,728	$ 1,644	$ 11,209	$ 1,943
Business Combination, Separately Recognized Transactions, Additional Disclosures, Acquisition Cost Expensed	4,446		7,613
Impairment of Intangible Assets (Excluding Goodwill)	2,237		2,237	0
Impairment of Intangible Assets, Finite-lived			2,237
Asset Impairment Charges	636		637	257
Gain (Loss) on Sale of Assets and Asset Impairment Charges	613		895
Impairment of Long-Lived Assets	172		173	$ 127
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	$ 375		$ 375