to determine stock-based compensation expense , the grant date fair value is applied to the options granted with a reduction for estimated forfeitures .
we recognize compensation expense for stock options on a straight-line basis over the specified vesting period .
at december 31 , 2013 and 2012 , options for 10204000 and 12759000 shares of common stock were exercisable at a weighted-average price of $ 89.46 and $ 90.86 , respectively .
the total intrinsic value of options exercised during 2014 , 2013 and 2012 was $ 90 million , $ 86 million and $ 37 million , respectively .
cash received from option exercises under all incentive plans for 2014 , 2013 and 2012 was approximately $ 215 million , $ 208 million and $ 118 million , respectively .
the tax benefit realized from option exercises under all incentive plans for 2014 , 2013 and 2012 was approximately $ 33 million , $ 31 million and $ 14 million , respectively .
shares of common stock available during the next year for the granting of options and other awards under the incentive plans were 17997353 at december 31 , 2014 .
total shares of pnc common stock authorized for future issuance under equity compensation plans totaled 19017057 shares at december 31 , 2014 , which includes shares available for issuance under the incentive plans and the employee stock purchase plan ( espp ) as described below .
during 2014 , we issued approximately 2.4 million shares from treasury stock in connection with stock option exercise activity .
as with past exercise activity , we currently intend to utilize primarily treasury stock for any future stock option exercises .
awards granted to non-employee directors in 2014 , 2013 and 2012 include 21490 , 27076 and 25620 deferred stock units , respectively , awarded under the outside directors deferred stock unit plan .
a deferred stock unit is a phantom share of our common stock , which is accounted for as a liability until such awards are paid to the participants in cash .
as there are no vesting or service requirements on these awards , total compensation expense is recognized in full for these awards on the date of grant .
incentive/performance unit share awards and restricted stock/share unit awards the fair value of nonvested incentive/performance unit share awards and restricted stock/share unit awards is initially determined based on prices not less than the market value of our common stock on the date of grant .
the value of certain incentive/performance unit share awards is subsequently remeasured based on the achievement of one or more financial and other performance goals .
the personnel and compensation committee ( 201cp&cc 201d ) of the board of directors approves the final award payout with respect to certain incentive/performance unit share awards .
these awards have either a three-year or a four-year performance period and are payable in either stock or a combination of stock and cash .
restricted stock/share unit awards have various vesting periods generally ranging from 3 years to 5 years .
beginning in 2013 , we incorporated several enhanced risk- related performance changes to certain long-term incentive compensation programs .
in addition to achieving certain financial performance metrics on both an absolute basis and relative to our peers , final payout amounts will be subject to reduction if pnc fails to meet certain risk-related performance metrics as specified in the award agreements .
however , the p&cc has the discretion to waive any or all of this reduction under certain circumstances .
the weighted-average grant date fair value of incentive/ performance unit share awards and restricted stock/unit awards granted in 2014 , 2013 and 2012 was $ 80.79 , $ 64.77 and $ 60.68 per share , respectively .
the total fair value of incentive/performance unit share and restricted stock/unit awards vested during 2014 , 2013 and 2012 was approximately $ 119 million , $ 63 million and $ 55 million , respectively .
we recognize compensation expense for such awards ratably over the corresponding vesting and/or performance periods for each type of program .
table 121 : nonvested incentive/performance unit share awards and restricted stock/share unit awards 2013 rollforward shares in thousands nonvested incentive/ performance unit shares weighted- average grant date fair value nonvested restricted stock/ weighted- average grant date fair value .

Shares in thousands
Nonvested Incentive/ Performance Unit Shares
Weighted-AverageGrant DateFair Value
Nonvested Restricted Stock/ Share Units
Weighted-AverageGrant DateFair Value
December 31, 2013
1,647
$63.49
3,483
$62.70
Granted
723
79.90
1,276
81.29
Vested/Released
(513)
63.64
(962)
62.32
Forfeited
(20)
69.18
(145)
69.44
December 31, 2014
1,837
$69.84
3,652
$69.03

the pnc financial services group , inc .
2013 form 10-k 185 .

Question: Analyse this data from a financial earnings document. in shares in thousands , for the non-vested incentive/ performance unit shares , what was the change in balance between december 31 2013 and december 31 2014?
Choices:
0
3025539
-190
-1565.7
190.0
Correct choice index: 4