Principal Residential Mortgage shares at least one belief with its  neighbor Norwest Mortgage: Scale is crucial. 
The subsidiary of Principal Financial Group, Des Moines, bought  ReliaStar Mortgage last month, boosting its servicing portfolio to $40   billion and putting it among the top 20 mortgage servicers.   
  
"In terms of servicing, you absolutely have to have scale to be able to  compete," said Paul Bognanno, chief executive officer of Principal   Residential Mortgage. "Scale economy is extremely important, and that   drives us to grow our operation."     
Excluding the ReliaStar purchase, Principal's servicing portfolio has  been growing at 20% per year, and Mr. Bognanno would like to maintain that   rate.   
  
A key attraction for Principal was ReliaStar's relationships with 800  mortgage brokers nationwide, which were its sole origination channel.   Principal originates loans through retail branches and correspondent   lenders, but it had not done any lending through brokers.     
"We didn't think we could continue to support our servicing portfolio  without additional help," Mr. Bognanno said. 
Help wasn't far away.
  
ReliaStar and Principal Mortgage are based in Des Moines, and both are  subsidiaries of insurance companies in the Midwest. The deal, Mr. Bognanno   said, "was based on a telephone call from our chairman to theirs" and did   not require investment banks' help.     
Terms of the sale, which closed late last month, were not disclosed.  Investment bankers estimated that, based on the size of its servicing   portfolio and annualized origination volume, a company like ReliaStar would   sell for $120 million to $130 million.     
Another selling point, Mr. Bognanno said, was ReliaStar's portfolio  retention operation-telemarketers who reach out to customers likely to   refinance, in order to prevent them from going to competitors.   
Principal's telemarketing unit also does portfolio retention but has  been distracted this year by other pursuits, including originating loans   through Microsoft's HomeAdvisor and Intuit's QuickenMortgage web sites, he   said.     
  
"We put so much energy into the Internet channel that we were not  getting as much portfolio retention as we could have," Mr. Bognanno said. 
Principal originated $7.1 billion in 1997 and $7.6 billion in the first  seven months of this year. Last year, it acquired $1.6 billion in servicing   and since January has added another $1.3 billion-not counting the ReliaStar   purchase.     
By contrast, ReliaStar's servicing portfolio was only $7.5 billion.
Last year, ReliaStar Mortgage originated $1.5 billion; in the first half  of this year it funded $1.2 billion. 
"Our servicing portfolio wasn't big enough that we could enjoy the  economies of scale and ancillary income that the big shops get," said Larry   James, former president of ReliaStar Mortgage.   
To get bigger would have required a major infrastructure investment that  the parent, ReliaStar Financial Services, Minneapolis, was not willing to   make.   
ReliaStar Financial bought Citizens Savings Bank of St. Cloud, Minn., in  January and renamed it ReliaStar Bank. 
"The bank satisfied our need to provide mortgage lending services to our  customers," said John Turner, CEO of ReliaStar Financial Services.