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Acquisition - Additional Information (Details)	Mar. 31, 2017 USD ($)
Senior Notes [Member] | 3.22% Senior Unsecured Promissory Note Payable [Member]
Business Acquisition [Line Items]
Debt issuance, aggregate principal amount	$ 60,000,000
Manufacturers Supply Company [Member]
Business Acquisition [Line Items]
Total purchase price payable in cash	57,900,000
Maximum contingent consideration	2,500,000
Fair value of contingent consideration	$ 1,300,000

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 7
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Amount of liability recognized arising from contingent consideration in a business combination.

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