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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
NET INCOME | $ 28,185 | $ 9,326
Derivative instruments: |  |
Net unrealized gain (loss), net of tax expense | (770) | (693)
Reclassification of net realized loss, net of tax expense | 1,207 | 1,141
Pension and other postretirement benefits activity, net of tax expense | 522 | 530
Total other comprehensive income | 959 | 978
COMPREHENSIVE INCOME | 29,144 | 10,304
Less: Comprehensive income attributable to noncontrolling interests | 4,873 | 4,873
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS | 24,271 | 5,431
APS |  |
NET INCOME | 28,035 | 12,126
Derivative instruments: |  |
Net unrealized gain (loss), net of tax expense | (770) | (693)
Reclassification of net realized loss, net of tax expense | 1,207 | 1,141
Pension and other postretirement benefits activity, net of tax expense | 611 | 611
Total other comprehensive income | 1,048 | 1,059
COMPREHENSIVE INCOME | 29,083 | 13,185
Less: Comprehensive income attributable to noncontrolling interests | 4,873 | 4,873
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS | $ 24,210 | $ 8,312

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