Basis of Presentation Basis of Presentation (Narrative) (Details)	Apr. 05, 2017
Subsequent event [Member]
Subsequent event
Subsequent event, description	On April 5, 2017, the Company entered into a new credit agreement for a new unsecured revolving credit facility and terminated its prior unsecured revolving credit facility dated January 14, 2011.

Describes the event or transaction that occurred between the balance sheet date and the date the financial statements are issued or available to be issued.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662

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