Subsequent Event: (Details) - Revolving Credit Facility - Fourth Amended and Restated Credit Agreement - Subsequent Event	May. 24, 2016 USD ($)
Subsequent Event [Line Items]
Maximum borrowing capacity	$ 325,000,000
Anticipated write-off of deferred costs	300,000
Amount of availability subject to threshold	$ 23,500,000.0
Percent of availability subject to threshold	10.00%
Fixed charge coverage ratio	1.0

Debt Instrument, Covenant Compliance, Fixed Charge Coverage Ratio

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- Definition

Debt Instrument, Covenant Compliance, Percentage of Capacity Subject to Threshold

+ References

No definition available.

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- Definition

Debt Instrument, Covenant Compliance, Threshold for Available Capacity

+ References

No definition available.

+ 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

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

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.

+ References

No definition available.

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- Definition

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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