Subsequent Events (Detail Textuals) (Revolving line of credit, USD $)	1 Months Ended
Jan. 30, 2015	Dec. 31, 2014
Subsequent Event [Line Items]
Maximum amount of line of credit facility		$ 150,000,000
Subsequent Event
Subsequent Event [Line Items]
Maximum amount of line of credit facility	225,000,000
Subsequent Event \| Amendment No. 4 to Second Amended and Restated Loan and Security Agreement
Subsequent Event [Line Items]
Maximum amount of line of credit facility	75,000,000
Line of credit facility, Basis Spread on Variable Rate	3.00%
Line of credit facility, Description of Variable Rate Basis	LIBOR
Line of credit facility, Floor rate	1.00%
Subsequent Event \| "Dutch auction" tender offer
Subsequent Event [Line Items]
Maximum amount of line of credit facility	$ 70,000,000
Line of credit facility, Description	As previously announced, Nicholas intends to purchase up to $70.0 million (but not less than $50.0 million) in aggregate value of the Company’s outstanding Common shares via a modified “Dutch auction” tender offer. If such a tender offer is not successfully completed, the credit line will remain at $150.0 million.
Line of credit facility, Basis Spread on Variable Rate	3.00%
Line of credit facility, Description of Variable Rate Basis	LIBOR
Line of credit facility, Floor rate	1.00%

Represents the floor rate related to line of credit facility.

No definition available.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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- Definition

Description of the terms of a credit facility arrangement. Terms typically include interest rate, collateral required, guarantees required, repayment requirements, and restrictions on use of assets and activities of the entity.

+ 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 210.5-02.19(b),22(b))

-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 19, 22

-Article 5

+ Details

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Balance Type:	credit
Period Type:	instant

- Details

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