Common Stock, Voting Rights, Number of Votes

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- Definition

Number of Classes of Common Stock

+ References

No definition available.

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- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.28)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29
-Article 5

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- Definition

The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

+ References

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- Definition

Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.

+ References

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- Definition

Amount of stock repurchase plan authorized.

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- Definition

Amount remaining of a stock repurchase plan authorized.

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- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30
-Article 5

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Shareholders' Equity (Narrative) (Details)	3 Months Ended
Shareholders' Equity (Narrative) (Details)	Mar. 31, 2017 USD ($) vote stock_class $ / shares shares	Mar. 31, 2016 $ / shares	Dec. 31, 2016 vote $ / shares shares	Sep. 06, 2011 USD ($)
Share Repurchases [Line Items]
Number of classes of common stock \| stock_class	3
Preferred stock, authorized shares \| shares	500,000.0		500,000.0
Preferred stock, par value (in dollars per share) \| $ / shares	$ 0.01		$ 0.01
Preferred stock, issued shares \| shares	0		0
Dividends declared per share (in dollars per share) \| $ / shares	$ 0.30	$ 0.30
Common Class A [Member]
Share Repurchases [Line Items]
Number of votes \| vote	1		1
Share repurchase program, authorized amount \| $				$ 100,000,000
Number of shares repurchased \| shares	0
Remaining authorized repurchases \| $	$ 82,900,000
Common Class B [Member]
Share Repurchases [Line Items]
Number of votes \| vote	10		10
Common Class C [Member]
Share Repurchases [Line Items]
Number of votes \| vote	10		10