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Share-Based Compensation Plans	3 Months Ended
	Mar. 31, 2019
Share-Based Compensation Plans [Abstract]
Share-Based Compensation Plans	16.  SHARE-BASED COMPENSATION PLANS For the three months ended March 31, 2019, share-based compensation awards granted were 178,015 restricted shares, granted on February 27, 2019, with a fair value of $223.45 per share and 16,855 performance share units, granted on February 27, 2019 with a fair value of $223.45 per unit.

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- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-URI http://asc.fasb.org/topic&trid=2228938

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 50
-URI http://asc.fasb.org/subtopic&trid=2208855

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- References

No definition available.

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