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Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2018

Stockholders' Equity [Abstract]

Schedule of Treasury Stock by Class [Table Text Block]

	Six-Month Period Ended June 30,
	2018					2017
			Dollar					Dollar
	Shares		Amount			Shares		Amount
	(In thousands, except shares data)
Beginning of period	8,678,427		$	104,502		8,711,025		$	104,860
Common shares used upon lapse of restricted stock units	(35,753)			(533)		(32,598)			(358)
End of period	8,642,674		$	103,969		8,678,427		$	104,502

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- References

No definition available.

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- Definition

Tabular disclosure of treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23309-112656

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