SHARE-BASED COMPENSATION: (Details 2) - Jun. 30, 2015 - $ / shares	Total
Stock options outstanding and exercisable by exercise price range
Options outstanding (in shares)	4,915,623
Options outstanding - Weighted-average remaining contractual life	4 years 11 months 1 day
Options outstanding - Weighted-average exercise price per share (in dollars per share)	$ 14.81
Options exercisable (in shares)	3,239,911
Options exercisable - Weighted-average exercise price per share (in dollars per share)	$ 16.66
Range of exercise price per share from $0.63 to $8.90
Stock options outstanding and exercisable by exercise price range
Exercise price per share, low end of range (in dollars per share)	0.63
Exercise price per share, high end of range (in dollars per share)	$ 8.90
Options outstanding (in shares)	1,012,561
Options outstanding - Weighted-average remaining contractual life	7 years 3 months 7 days
Options outstanding - Weighted-average exercise price per share (in dollars per share)	$ 1.68
Options exercisable (in shares)	308,431
Options exercisable - Weighted-average exercise price per share (in dollars per share)	$ 2.14
Range of exercise price per share from $11.08 to $14.42
Stock options outstanding and exercisable by exercise price range
Exercise price per share, low end of range (in dollars per share)	11.08
Exercise price per share, high end of range (in dollars per share)	$ 14.42
Options outstanding (in shares)	1,404,362
Options outstanding - Weighted-average remaining contractual life	4 years 3 months 29 days
Options outstanding - Weighted-average exercise price per share (in dollars per share)	$ 13.17
Options exercisable (in shares)	1,204,803
Options exercisable - Weighted-average exercise price per share (in dollars per share)	$ 13.12
Range of exercise price per share from $15.10 to $19.76
Stock options outstanding and exercisable by exercise price range
Exercise price per share, low end of range (in dollars per share)	15.10
Exercise price per share, high end of range (in dollars per share)	$ 19.76
Options outstanding (in shares)	988,969
Options outstanding - Weighted-average remaining contractual life	5 years 5 months 12 days
Options outstanding - Weighted-average exercise price per share (in dollars per share)	$ 16.94
Options exercisable (in shares)	549,649
Options exercisable - Weighted-average exercise price per share (in dollars per share)	$ 16.27
Range of exercise price per share from $20.44 to $25.00
Stock options outstanding and exercisable by exercise price range
Exercise price per share, low end of range (in dollars per share)	20.44
Exercise price per share, high end of range (in dollars per share)	$ 25.00
Options outstanding (in shares)	1,363,721
Options outstanding - Weighted-average remaining contractual life	3 years 9 months 11 days
Options outstanding - Weighted-average exercise price per share (in dollars per share)	$ 22.27
Options exercisable (in shares)	1,045,683
Options exercisable - Weighted-average exercise price per share (in dollars per share)	$ 22.57
Range of exercise price per share from $26.33 to $35.16
Stock options outstanding and exercisable by exercise price range
Exercise price per share, low end of range (in dollars per share)	26.33
Exercise price per share, high end of range (in dollars per share)	$ 35.16
Options outstanding (in shares)	69,850
Options outstanding - Weighted-average remaining contractual life	2 years 5 months 5 days
Options outstanding - Weighted-average exercise price per share (in dollars per share)	$ 32.42
Options exercisable (in shares)	55,185
Options exercisable - Weighted-average exercise price per share (in dollars per share)	$ 32.30
Range of exercise price per share from $41.38 to $62.06
Stock options outstanding and exercisable by exercise price range
Exercise price per share, low end of range (in dollars per share)	41.38
Exercise price per share, high end of range (in dollars per share)	$ 62.06
Options outstanding (in shares)	76,160
Options outstanding - Weighted-average remaining contractual life	3 months 26 days
Options outstanding - Weighted-average exercise price per share (in dollars per share)	$ 41.97
Options exercisable (in shares)	76,160
Options exercisable - Weighted-average exercise price per share (in dollars per share)	$ 41.97