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.

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

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- Definition

The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

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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
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-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

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- Definition

Percentage of vesting of share-based compensation awards.

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- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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No definition available.

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- Definition

Amount of maximum borrowing capacity increase (decrease).

+ References

No definition available.

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- Definition

Represents the vesting rights percentage when the individual completes a specified period of continuous service under the compensation plan.

+ References

No definition available.

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Subsequent events (Details) - USD ($) $ in Thousands		1 Months Ended	12 Months Ended
Subsequent events (Details) - USD ($) $ in Thousands	Feb. 23, 2016	Feb. 29, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Feb. 22, 2016	Nov. 21, 2014
Subsequent events
Additional borrowings			$ 20,000	$ 3,500	$ 0
Revolving Line of Credit
Subsequent events
Maximum borrowing capacity							$ 46,500
Performance-based restricted stock unit awards
Subsequent events
Vesting percentage upon completion of continuous service			33.00%
Subsequent Event \| Revolving Line of Credit
Subsequent events
Additional borrowings		$ 5,000
Increase in borrowing capacity	$ 23,250
Maximum borrowing capacity	$ 69,750					$ 46,500
Subsequent Event \| Certain Executives \| Time-based restricted stock unit awards
Subsequent events
Granted (in shares)		975,000
Subsequent Event \| Certain Executives \| Performance-based restricted stock unit awards
Subsequent events
Granted (in shares)		975,000
Subsequent Event \| Other executive officers \| Time-based restricted stock unit awards
Subsequent events
Granted (in shares)		192,000
Vesting period		3 years
Subsequent Event \| Other executive officers \| Performance-based restricted stock unit awards
Subsequent events
Granted (in shares)		192,000
Vesting percentage upon completion of continuous service		8.33%
Subsequent Event \| Other executive officers \| Performance-based restricted stock unit awards \| Before March 15, 2018
Subsequent events
Vesting percentage		66.67%
Subsequent Event \| Other executive officers \| Performance-based restricted stock unit awards \| On May 1, 2018
Subsequent events
Vesting percentage		8.33%
Subsequent Event \| Non-executive personnel \| Time-based restricted stock unit awards
Subsequent events
Granted (in shares)		539,000
Vesting period		3 years