Subsequent Event Subsequent Event (Details) - USD ($) $ in Thousands	6 Months Ended	9 Months Ended
Jun. 30, 2013	Sep. 30, 2017	Sep. 14, 2017	Apr. 10, 2013
Subsequent Event [Line Items]
Preferred shares redeemed			2,000	2,000
Payments for Repurchase of Redeemable Preferred Stock	$ 50,352	$ 50,420

The cash outflow for reacquisition of callable preferred stock.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585

Name:	us-gaap_PaymentsForRepurchaseOfRedeemablePreferredStock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration