Share Repurchase Plan (Details) - USD ($)	3 Months Ended
Mar. 31, 2019	Mar. 19, 2018
Equity [Abstract]
Stock repurchase program, authorized amount		$ 50,000,000
Repurchased common shares (in shares)	313,904
Cost to repurchase common shares	$ 12,287,000
Cost to repurchase common shares (in dollars per share)	$ 39.14
Stock repurchase program, remaining authorized repurchase amount	$ 25,500,000

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
-Topic 505
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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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Balance Type:	debit
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