Subsequent Event (Notes)	9 Months Ended
Sep. 30, 2017
Subsequent Events [Abstract]
Subsequent Events [Text Block]	On October 24, 2017, the Company's Board of Directors declared an annual cash dividend of $1.52 per share, to be paid on January 5, 2018, to all shareholders of record on December 1, 2017.

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

Name:	us-gaap_SubsequentEventsTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration