Acquisitions Allocation of Consideration Paid (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Apr. 17, 2015	Jan. 20, 2015	Dec. 31, 2014	Dec. 31, 2013
Assets:
Goodwill	$ 96,321			$ 45,951	$ 87,362
API Group plc (API)
Assets:
Cash		$ 5,989
Trade and other receivables		24,160
Inventories		23,714
Prepaid expenses and other current assets		6,452
Property, plant and equipment		43,928
Investments		1,395
Goodwill		20,327
Other intangible assets		23,977
Total assets acquired		149,942
Liabilities:
Accounts payable		24,639
Other accrued Liabilities		6,025
Short-term debt		2,105
Long-term debt		23,348
Accrued pension liability		22,006
Deferred income taxes		1,092
Total liabilities assumed		79,215
Net assets acquired		$ 70,727
CoSine Communications, Inc. (CoSine)
Assets:
Cash			$ 17,614
Prepaid expenses and other current assets			7
Investments			54,228
Goodwill			8,295
Total assets acquired			80,144
Liabilities:
Accounts payable			280
Other accrued Liabilities			783
Total liabilities assumed			1,063
Fair value of noncontrolling interest			12,842
Net assets acquired			$ 66,239