Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717

Name:	us-gaap_OperatingLeasesRentExpenseNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

COMMITMENTS AND CONTINGENCIES - ADDITIONAL INFORMATION (Details) $ in Millions		12 Months Ended
	Jan. 20, 2014 employee	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Operating leases, rent expense, total \| $		$ 33.3	$ 30.4	$ 37.4
Former Employee \| Eastern District Of Pennsylvania
Loss Contingencies [Line Items]
Number of employees	2
Employee \| Eastern District Of Pennsylvania
Loss Contingencies [Line Items]
Number of employees	1