Exhibit 24

                               POWER OF ATTORNEY

        The undersigned understands that, from time to time, the Carlyle
Companies (defined below) are required to prepare, execute and file certain
federal and state securities laws filings.

        Know all by these presents, that the undersigned hereby constitutes and
appoints each of Jeffrey Ferguson, Jeremy Anderson, Joanne Cosiol, Anne
Frederick, Kevin Gasque, Erica Herberg, Norma Kuntz, Joshua Lefkowitz, David
Lobe, Karen McMonagle, Aditya Narain, Michelle Reing, Ryan Toteja and Catherine
Ziobro, or any of them signing singly, and with full power of substitution, the
undersigned's true and lawful attorney-in-fact to:

        (1)  prepare, execute in the name of each Carlyle Company and on behalf
             of each Carlyle Company, and submit to the U.S. Securities and
             Exchange Commission (the "SEC") a Form ID, including amendments
             thereto, and any other documents necessary or appropriate to obtain
             codes and passwords enabling the undersigned to make electronic
             filings with the SEC of Forms D ("Form D") required to be filed in
             accordance with Rule 503 ("Rule 503") promulgated with respect to
             Sections 4(2), 4(6) and 3(b) of the Securities Act of 1933 (the
             "1933 Act") and reports required by Sections 13(d) and 16(a) of the
             Securities Exchange Act of 1934 (the "1934 Act") or any rule or
             regulation of the SEC;

        (2)  prepare and execute for and on behalf of each Carlyle Company, in
             the undersigned's capacity as a Chairman, authorized person,
             officer and/or director of each Carlyle Company, federal and state
             securities laws filings including without limitation Forms D
             pursuant to Rule 503 and Schedules 13D and 13G and Forms 3, 4, and
             5 in accordance with Sections 13(d) and 16(a) of the 1934 Act and
             the rules thereunder;

        (3)  do and perform any and all acts for and on behalf of each Carlyle
             Company which may be necessary or desirable to complete and execute
             any such federal and state securities laws filings including
             without limitation Forms D, Schedules 13D and 13G and Forms 3, 4,
             and 5, complete and execute any amendment or amendments thereto,
             and timely file such form with the SEC and the securities
             administrators of any state, the District of Columbia, the
             Commonwealth of Puerto Rico, Guam and the United States Virgin
             Islands or their designees and any stock exchange or similar
             authority; and

        (4)  take any other action of any type whatsoever in connection with the
             foregoing which, in the opinion of such attorney- in-fact, may be
             of benefit to, in the best interest of, or legally required by, the
             undersigned, it being understood that the documents executed by
             such attorney-in-fact on behalf of the undersigned pursuant to this
             Power of Attorney shall be in such form and shall contain such
             terms and conditions as such attorney-in-fact may approve in such
             attorney-in- fact's discretion.

        The undersigned hereby grants to each such attorney-in-fact full power
and authority to do and perform any and every act and thing whatsoever
requisite, necessary, or proper to be done in the exercise of any of the rights
and powers herein granted, as fully to all intents and purposes  as the
undersigned might or could do if personally present, with full power of
substitution or revocation, hereby ratifying and confirming all that such
attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall
lawfully do or cause to be done by virtue of this power of attorney and the
rights and powers herein granted, whether the same needs to be executed, taken
or done by him in his capacity as a current or former member, partner,
shareholder, director or officer of any company, partnership, corporation,
organization, firm, branch or other entity connected with, related to or
affiliated with any of the entities constituting the Carlyle Companies or
entities that directly or indirectly hold interests in the Carlyle Companies.

        The undersigned acknowledges that the foregoing attorneys-in-fact, in
serving in such capacity at the request of the undersigned, are not assuming any
of the undersigned's responsibilities to comply with federal and state
securities laws, including without limitation Rule 503 of the 1933 Act or
Section 13 and Section 16 of the 1934 Act.

        This Power of Attorney and all authority conferred hereby shall not be
terminated by operation of law, whether by the death or incapacity of the
undersigned or by occurrence of any other event. Actions taken by an attorney-
in-fact pursuant to this Power of Attorney shall be as valid as if any event
described in the preceding sentence had not occurred, whether or not the
attorney-in-fact shall have received notice of such event. Notwithstanding the
foregoing, (i) in the event that an attorney-in- fact is no longer employed by
The Carlyle Group Employee Co., L.L.C. or its affiliates, this Power of Attorney
and all authority conferred hereby shall be immediately terminated with respect
to such Attorney, and (ii) the undersigned may terminate or revoke this Power of
Attorney at any time.

        For purposes hereof, the "Carlyle Companies" shall consist of: (i)
Carlyle Group Management L.L.C., The Carlyle Group Inc., Carlyle Holdings I GP
Inc., Carlyle Holdings I GP Sub L.L.C., Carlyle Holdings I L.P., TC Group,
L.L.C., Carlyle Holdings II GP L.L.C., Carlyle Holdings II L.L.C., CG Subsidiary
Holdings L.L.C., TC Group Investment Holdings, L.P., Carlyle Holdings III GP
Management L.L.C., Carlyle Holdings III GP L.P., Carlyle Holdings III GP Sub
L.L.C., Carlyle Holdings III L.P., TC Group Cayman L.P., TC Group Sub L.P., TC
Group Investment Holdings Sub L.P., TC Group Cayman Investment Holdings Sub
L.P., TC Group Cayman Sub L.P., Five Overseas CG Investment L.L.C. and (ii) the
subsidiaries and affiliates of the foregoing in clause (i), including without
limitation investment funds sponsored directly or indirectly by one or more of
the Carlyle Companies.

        IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 1st day of January, 2020.

                                        By:    /s/ Curtis L. Buser
                                               --------------------------------
                                        Name:  Curtis L. Buser
                                        Title: Chief Financial Officer