CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($) $ / shares shares
Statement of Stockholders' Equity [Abstract]
Pension and other postretirement adjustments, tax | $	$ 643
Amortization of forward starting swaps, tax | $	$ 1,253
Issuance of common stock from performance share units and exercise of stock options | shares	311,017
Repurchase of common stock (in shares) | shares	725,993
Cash dividend declared, per common share outstanding | $ / shares	$ 0.68