T-SQL (SS2K8) :: Select Statement With Derived Order Status

Here is my requirement

Table 1 Order
order ID, Sales order ID order date, order type

Table 2 Order details
Order Details ID, Order ID, Order Stage

Table 3 Related Order details
Order ID(FK to Order ID), Related Order Details ID(FK to Order Details ID), Related Order ID( FK to Order ID)

Here is example

Table 1 Order
1, 1234, 2015-01-01, Refill
2, 1234, 2015-02-02, Extension

Table 2 Order Details
1, 1, Approved
2, 1, Approved
3, 2, Rejected

Table 3 Related Order Details
2, 1, 1
2, 2, 1

I have to Select Order, Order Details and Order Status

Order Status is determined from Order Stage as follows:

If, at least one order detail line(from Order Details and Related Order details table) is approved, that Order status=Approved.

For the example, Order Status of Order ID=2, is Approved based on order status for order details lines 3(from table 2) and order details ID 1 and 2 (from table 3)

How to combined order stage from table 2 and table 3 and then compute order status.