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Share-Based Payments - Summary of Restricted Stock and RSU Vesting Dates (Detail) - LTIP [Member]	Mar. 31, 2016 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	1,023,998
April 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	4,627
June 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	543
July 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	4,158
October 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	4,158
December 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	380,164
January 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	3,737
April 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	3,745
June 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	544
July 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	2,580
October 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	2,577
December 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	376,769
January 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	1,330
April 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	1,331
June 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	544
December 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	237,191
Shares Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	102,756
Shares Vesting [Member] | April 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	4,627
Shares Vesting [Member] | June 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	0
Shares Vesting [Member] | July 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	4,158
Shares Vesting [Member] | October 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	4,158
Shares Vesting [Member] | December 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	28,920
Shares Vesting [Member] | January 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	3,737
Shares Vesting [Member] | April 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	3,745
Shares Vesting [Member] | June 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	0
Shares Vesting [Member] | July 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	2,580
Shares Vesting [Member] | October 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	2,577
Shares Vesting [Member] | December 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	28,923
Shares Vesting [Member] | January 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	1,330
Shares Vesting [Member] | April 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	1,331
Shares Vesting [Member] | June 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	0
Shares Vesting [Member] | December 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	16,670
RSU Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	921,242
RSU Vesting [Member] | April 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	0
RSU Vesting [Member] | June 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	543
RSU Vesting [Member] | July 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	0
RSU Vesting [Member] | October 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	0
RSU Vesting [Member] | December 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	351,244
RSU Vesting [Member] | January 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	0
RSU Vesting [Member] | April 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	0
RSU Vesting [Member] | June 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	544
RSU Vesting [Member] | July 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	0
RSU Vesting [Member] | October 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	0
RSU Vesting [Member] | December 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	347,846
RSU Vesting [Member] | January 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	0
RSU Vesting [Member] | April 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	0
RSU Vesting [Member] | June 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	544
RSU Vesting [Member] | December 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vesting	220,521

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- Definition

Share based compensation arrangement by share based payment award equity instruments other than options expected to vest.

+ References

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+ References

No definition available.

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