Aggregate dividends declared during the period for each share of common stock outstanding.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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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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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.

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Subsequent Events (Details) - USD ($)	2 Months Ended
Subsequent Events (Details) - USD ($)	Mar. 14, 2018	Feb. 08, 2018	Feb. 07, 2018	Oct. 13, 2017	Jan. 31, 2016
Subsequent Event [Line Items]
Amount of credit facility				$ 162,000,000
Current borrowing capacity				175,000,000
Subsequent event
Subsequent Event [Line Items]
Amount of credit facility		$ 167,000,000
Current borrowing capacity			$ 162,000,000
Per share dividend announced by the company (in dollars per share)	$ 0.10
Revolving Credit Facility [Member] \| Line of credit
Subsequent Event [Line Items]
Amount of credit facility				45,000,000	$ 50,000,000
Revolving Credit Facility [Member] \| Line of credit \| Subsequent event
Subsequent Event [Line Items]
Amount of credit facility		50,000,000
Term loan facility \| Line of credit
Subsequent Event [Line Items]
Amount of credit facility				$ 117,000,000	$ 125,000,000
Term loan facility \| Line of credit \| Subsequent event
Subsequent Event [Line Items]
Amount of credit facility		$ 117,000,000