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MidCap Blend Account (Prospectus Summary) | MidCap Blend Account
MidCap Blend Account
Objective:
The Account seeks long-term growth of capital.
Fees and Expenses of the Account
This table describes the fees and expenses that you may pay if you buy and hold
shares of the Account. These fees and expenses do not reflect the fees and
expenses of any variable insurance contract that may invest in the Account and
would be higher if they did.
Annual Account Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses MidCap Blend Account
Class 1
Class 2
Management Fees 0.54% 0.54%
Distribution and/or Service (12b-1) Fees    0.25%
Other Expenses 0.01% 0.01%
Total Annual Account Operating Expenses 0.55% 0.80%
Example
This Example is intended to help you compare the cost of investing in the
Account with the cost of investing in other mutual funds.

The Example assumes that you invest $10,000 in the Account for the time periods
indicated and then redeem all of your shares at the end of those periods. The
Example also assumes that your investment has a 5% return each year and that the
Account's operating expenses remain the same. If separate account expenses and
contract level expenses were included, expenses would be higher. Although your
actual costs may be higher or lower, based on these assumptions your costs would
be:
Expense Example MidCap Blend Account (USD $)
Expense Example, With Redemption, 1 Year
Expense Example, With Redemption, 3 Years
Expense Example, With Redemption, 5 Years
Expense Example, With Redemption, 10 Years
Class 1
56 176 307 689
Class 2
82 255 444 990
Portfolio Turnover
The Account pays transaction costs, such as commissions, when it buys and sells
securities (or "turns over" its portfolio). A higher portfolio turnover rate may
indicate higher transaction costs. These costs, which are not reflected in
annual Account operating expenses or in the example, affect the Account's
performance. During the most recent fiscal year, the Account's portfolio
turnover rate was 28.9% of the average value of its portfolio.
Principal Investment Strategies
Under normal circumstances, the Account invests at least 80% of its net assets
in equity securities of companies with medium market capitalizations (those with
market capitalizations similar to companies in the Russell Midcap® Index (as of
December 31, 2011, this range was between approximately $117 million and $20.51
billion) at the time of purchase. The Account may invest in foreign securities.

The Account invests in equity securities with value and/or growth
characteristics and constructs an investment portfolio that has a "blend" of
equity securities with these characteristics. Investing in value equity
securities is an investment strategy that emphasizes buying equity securities
that appear to be undervalued. The growth orientation selection emphasizes
buying equity securities of companies whose potential for growth of capital and
earnings is expected to be above average. The Account does not have a policy of
preferring one of these categories over the other.
Principal Risks
The Account may be an appropriate investment for investors seeking long-term
growth of capital and willing to accept the potential for short-term
fluctuations in the value of investments.

The value of your investment in the Account changes with the value of the
Account's investments. Many factors affect that value, and it is possible to
lose money by investing in the Account. An investment in the Account is not a
deposit of a bank and is not insured or guaranteed by the Federal Deposit
Insurance Corporation or any other government agency. The principal risks of
investing in the Account, in alphabetical order, are:
  
Currency Risk.  Risks of investing in securities denominated in, or that trade
in, foreign (non-U.S.) currencies include changes in foreign exchange rates and
foreign exchange restrictions.

Equity Securities Risk. Equity securities (common, convertible preferred stocks
and other securities whose values are tied to the price of stocks, such as
rights, warrants and convertible debt securities) could decline in value if the
issuer's financial condition declines or in response to overall market and
economic conditions. A fund's principal market segment(s), such as large cap,
mid cap or small cap stocks, or growth or value stocks, may underperform other
market segments or the equity markets as a whole. Investments in smaller
companies and mid-size companies may involve greater risk and price volatility
than investments in larger, more mature companies.

Foreign Securities Risk. The risks of foreign securities include loss of value
as a result of: political or economic instability; nationalization,
expropriation or confiscatory taxation; settlement delays; and limited
government regulation (including less stringent reporting, accounting, and
disclosure standards than are required of U.S. companies).

Growth Stock Risk. If growth companies do not increase their earnings at a rate
expected by investors, the market price of the stock may decline significantly,
even if earnings show an absolute increase. Growth company stocks also typically
lack the dividend yield that can lessen price declines in market downturns.

Risk of Being an Underlying Fund. An underlying fund of a fund of funds may
experience relatively large redemptions or investments as the fund of funds
periodically reallocates or rebalances its assets. These transactions may cause
the underlying fund to sell portfolio securities to meet such redemptions, or to
invest cash from such investments, at times it would not otherwise do so, and
may as a result increase transaction costs and adversely affect underlying fund
performance.

Value Stock Risk. The market may not recognize the intrinsic value of value
stocks for a long time, or they may be appropriately priced at the time of
purchase.
Performance
The following information provides some indication of the risks of investing in
the Account by showing changes in the Account's performance from year to year
and by showing how the Account's average annual returns for 1, 5, and 10 years
(or, if shorter, the life of the Account) compare with those of one or more
broad measures of market performance. Past performance is not necessarily an
indication of how the Account will perform in the future. Performance figures
for the Accounts do not include any separate account expenses, cost of
insurance, or other contract-level expenses; total returns for the Accounts
would be lower if such expenses were included.

Performance of the Class 2 shares for periods prior to inception of the class
reflects performance of the Class 1 shares, which have the same investments as
Class 2 shares, but has been adjusted downward to reflect the higher expenses of
Class 2 shares.
Calendar Year Total Returns (%) as of 12/31 each year (Class 1 Shares)
Bar Chart
Highest return for a quarter during the period of the bar       Q2 '09    18.19%
chart above:                                                           
Lowest return for a quarter during the period of the bar        Q4 '08   -23.92%
chart above:
Average Annual Total Returns (%) For the periods ended December 31, 2011
Average Annual Total Returns MidCap Blend Account
Average Annual Returns, Label
Average Annual Returns, 1 Year
Average Annual Returns, 5 Years
Average Annual Returns, 10 Years
Average Annual Returns, Inception Date
Class 1
MidCap Blend Account - Class 1 8.29% 5.39% 8.75% Dec. 18, 1987
Class 2
MidCap Blend Account - Class 2 8.00% 5.11% 8.46% Sep. 09, 2009
Russell Midcap Index
Russell Midcap Index (reflects no deduction for fees, expenses, or taxes) (1.55%) 1.41% 6.99%