Stock-based Compensation (Stock-based Compensation Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Share-based Compensation [Abstract]
Stock-based compensation expense	$ 553us-gaap_ShareBasedCompensation	$ 437us-gaap_ShareBasedCompensation
2015	1,740
2016	1,929
2017	1,690
2018	1,269
2019	581
2020	61
Total	$ 7,270

Future Share-based Compensation Expense, Remainder of Current Year

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- Definition

Future Share-based Compensation Expense, Year Five

+ References

No definition available.

+ Details

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- Definition

Future Share-based Compensation Expense, Year Four

+ References

No definition available.

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- Definition

Future Share-based Compensation Expense, Year One

+ References

No definition available.

+ Details

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- Definition

Future Share-based Compensation Expense, Year Three

+ References

No definition available.

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- Definition

Future Share-based Compensation Expense, Year Two

+ References

No definition available.

+ Details

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ 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 (i)

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

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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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