Number of persons employed by the Entity

No definition available.

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- Definition

Vesting period.

+ References

No definition available.

+ Details

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- Details

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, 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 (a)(1)

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

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ 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)(2)(iii)(1)

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

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ 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)(2)(iii)(1)

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

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Details

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- Details

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- Details

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- Details

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- Details

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Stock-Based Compensation (Nonvested Stock Awards) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 employee	Sep. 30, 2012 employee	Dec. 31, 2011 employee
Restricted stock and restricted stock units [Member]
Summary of nonvested stock awards granted
Number of Shares Granted (shares)	241,276
Weighted Average Grant Date Fair Value (usd per share)	$ 6.29	$ 5.86	$ 7.64
Director Group 1 [Member]
Summary of nonvested stock awards granted
Vesting Period	1 year
Director Group 1 [Member] \| 2008 Equity Incentive Plan [Member] \| Restricted stock and restricted stock units [Member]
Summary of nonvested stock awards granted
Number of Shares Granted (shares)	51,276	75,490	56,261
Vesting Period	1 year or less	1 year or less	1 year or less
Weighted Average Grant Date Fair Value (usd per share)	$ 6.45	$ 5.67	$ 7.55
Director [Member] \| 2008 Equity Incentive Plan [Member] \| Restricted stock and restricted stock units [Member]
Summary of nonvested stock awards granted
Number of Shares Granted (shares)		17,092
Vesting Period		3 years
Weighted Average Grant Date Fair Value (usd per share)		$ 6.83
Director Group 2 [Member] \| 2008 Equity Incentive Plan [Member] \| Restricted stock and restricted stock units [Member]
Summary of nonvested stock awards granted
Number of Shares Granted (shares)	0		8,546
Vesting Period	3 years		3 years
Weighted Average Grant Date Fair Value (usd per share)	$ 0.00		$ 7.72
Employee Group 1 [Member]
Summary of nonvested stock awards granted
Vesting Period	3 years
Employee Group 1 [Member] \| 2008 Equity Incentive Plan [Member] \| Restricted stock and restricted stock units [Member]
Summary of nonvested stock awards granted
Number of Shares Granted (shares)	120,000	599,875	426,286
Vesting Period	3 years	3 years	3 years
Weighted Average Grant Date Fair Value (usd per share)	$ 6.36	$ 5.82	$ 7.55
Employee inducement [Member] \| Restricted stock and restricted stock units [Member] \| Minimum [Member]
Summary of nonvested stock awards granted
Vesting Period			3 years
Employee inducement [Member] \| Restricted stock and restricted stock units [Member] \| Maximum [Member]
Summary of nonvested stock awards granted
Vesting Period			4 years
Employee inducement [Member] \| 2008 Equity Incentive Plan [Member] \| Restricted stock and restricted stock units [Member]
Summary of nonvested stock awards granted
Number of Shares Granted (shares)	70,000	20,000	45,000
Vesting Period			P3Y
Vesting Period	3 years	3 years
Weighted Average Grant Date Fair Value (usd per share)	$ 6.04	$ 7.14	$ 8.54
Number of employees				2	1	1