Build-to-suit Lease (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Capital Leased Assets [Line Items]
Buildings and Improvements, Gross	$ 6,062
Build to suit liability	$ 4,711	$ 0

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_CapitalLeasedAssetsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration