Other comprehensive income loss reduction to future benefit obligations related to pension plan.

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- Definition

Share Price, Net

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No definition available.

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- Definition

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

+ References

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- Definition

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

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- Definition

Face amount or stated value per share of common stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 30

-Article 5

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- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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- Definition

The cash inflow from the additional capital contribution to the entity.

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

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-Name Accounting Standards Codification

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-Subparagraph (a)

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

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-Subparagraph (c)(1)(iv)(3)

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(2)

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- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

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- Definition

Number of new stock issued during the period.

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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-Name Regulation S-X (SX)

-Number 210

-Section 02

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The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

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No definition available.

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Stockholders' Equity - Narrative (Details) (USD $)	0 Months Ended		3 Months Ended				12 Months Ended			0 Months Ended
Stockholders' Equity - Narrative (Details) (USD $)	Jul. 19, 2013	Sep. 28, 2012	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Feb. 03, 2015	Dec. 31, 2006
Stockholders Equity (Textual) [Abstract]
Common stock, outstanding shares			98,828,000us-gaap_CommonStockSharesOutstanding				98,828,000us-gaap_CommonStockSharesOutstanding	95,924,000us-gaap_CommonStockSharesOutstanding
Issuance of common stock	3,000,000	9,200,000
Common stock, par value (in dollars per share)			$ 0.01				$ 0.01	$ 0.01
Gross price per share		$ 23.87us-gaap_SharePrice
Net price per share	$ 26.13hr_SharePriceNet	$ 22.85hr_SharePriceNet
Proceeds from issuance of common stock, net	$ 78,300,000	$ 201,100,000					$ 76,856,000	$ 220,252,000	$ 202,352,000
Dividend per share to common stockholders, paid (in dollars per share)			$ 0.3	$ 0.3	$ 0.3		$ 1.20	$ 1.20	$ 1.20
Dividends per share to common stockholders, declared (in dollars per share)						$ 0.30
Number of common shares authorized to be repurchased											3,000,000
Other comprehensive income loss reduction in future benefit obligations related to pension plan							$ 2,600,000	$ 2,100,000
Subsequent Event [Member] \| Dividend Declared [Member]
Stockholders Equity (Textual) [Abstract]
Dividends per share to common stockholders, declared (in dollars per share)										$ 0.30
Chief Executive Officer [Member]
Stockholders Equity (Textual) [Abstract]
Common stock, outstanding shares			784,669				784,669
Chief Executive Officer [Member] \| Restricted Stock [Member]
Stockholders Equity (Textual) [Abstract]
Shares vested in period (shares)							838,886
Shares forfeited by CEO and then redeemed by the Company to satisfy minimum tax withholding requirements							351,913
Common stock, outstanding shares			87,779				87,779