Share Repurchase Program (Details) - USD ($) $ in Thousands, shares in Millions	3 Months Ended	9 Months Ended	14 Months Ended
Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019
Share Repurchase Program [Abstract]
Stock Repurchase Program, Authorized Amount		$ 50,000		$ 50,000
Repurchase of common shares, shares		(0.2)		(1.3)
Repurchase of common shares	$ 11,085	$ 5,150	$ 11,085	$ 30,900
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 19,100		$ 19,100

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
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-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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