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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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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Name:	us-gaap_TreasuryStockValueAcquiredCostMethod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Stockholders' Equity - Stock Repurchases (Details) - USD ($)		3 Months Ended	12 Months Ended
	Oct. 02, 2018	Dec. 31, 2018	Dec. 31, 2018
Stock Repurchases
Repurchase amount			$ 23,537,000
2018 Repurchase Program
Stock Repurchases
Amount authorized	$ 20,000,000
Repurchase program, period	18 months
Number of shares repurchased (shares)		7,318,172
Repurchase amount		$ 20,000,000
Outside of repurchase program
Stock Repurchases
Number of shares repurchased (shares)		1,400,572
Repurchase amount		$ 3,536,000