Stock Based Compensation Stock Based Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Stock Based Compensation
Share-based Compensation	$ (747)us-gaap_ShareBasedCompensation	$ 1,125us-gaap_ShareBasedCompensation
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	40,000
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price	$ 28.40
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	7 years
Minimum [Member]
Stock Based Compensation
Equity Share Payout Range	0
Maximum [Member]
Stock Based Compensation
Equity Share Payout Range	45,951
MSU [Member]
Stock Based Compensation
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	30,633
Share-based Compensation Award, Tranche One [Member]
Stock Based Compensation
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	380,000
Share Based Compensation Non Option Equity Instruments Granted Weighted Average Exercise Price	$ 28.40
Share-based Compensation Award, Tranche Two [Member]
Stock Based Compensation
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	29,373
Share Based Compensation Non Option Equity Instruments Granted Weighted Average Exercise Price	$ 25.16

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- Definition

Share Based Compensation Non Option Equity Instruments Granted Weighted Average Exercise Price

+ References

No definition available.

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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- Definition

Net number of non-option equity instruments granted to participants.

+ References

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)(1)(iv)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

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- Definition

Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)(1)

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- Definition

Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

+ References

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)(1)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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