Trying to get layout elevation on 'splitview'

I am creating a multi-pane layout:

http://ift.tt/Tqn5cc

I have this layout file:

<fragment android:id="@+id/list"
    android:layout_width="0dp"
    android:layout_height="match_parent"
    android:layout_weight="3"
    android:layout_marginTop="10dp"
    android:layout_marginLeft="15dp"
    android:layout_marginRight="15dp"
    class="com.test.List"/>

<fragment android:id="@+id/detail"
    android:layout_width="0dp"
    android:layout_height="match_parent"
    android:layout_weight="7"
    class="com.test.Detail"/>

I want that right side (detail) panel to have an elevation, but only on the left side when it hits the list.

IE:

So that detail panel is not a cardview (from what I can tell).

In my detail layout:

    <LinearLayout
        android:orientation="vertical"
        android:scrollbars="vertical"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:elevation="6dp"
        android:padding="10dp">

        <!-- Date -->
        <TextView android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/date"
            android:textStyle="bold"
            android:textSize="17sp"
            />

        <TextView android:id="@+id/title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:paddingLeft="5dp"
            android:textSize="17sp"
            android:textIsSelectable="false"
            />

        <!-- Reference Number -->
       <TextView  android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/description"
            android:textStyle="bold"
            android:paddingTop="10dp"
            android:textSize="17sp"
            />

    ...

But I am not getting any elevation. I have tried elevation on the scrollview and its child linear layout with no luck. Although I am not sure this would accomplish the left side elevation anyways.

Any ideas on how to accomplish this?