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CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) $ in Thousands | 6 Months Ended
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Jun. 30, 2017 USD ($) $ / shares shares
Statement of Stockholders' Equity [Abstract] |
Pension and other postretirement adjustments, tax | $ 1,146
Amortization of forward starting swaps, tax | $ 1,218
Issuance of common stock from performance share units and exercise of stock options (in shares) | shares | 335,902
Issuance of common stock from exercise of stock options and deferred compensation plans, tax amount | $ 4,998
Repurchase of common stock (in shares) | shares | 106,000
Cash dividends declared, per common share outstanding (in dollars per share) | $ / shares | $ 0.74

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