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Earnings per Share/Capital Stock: (Details 2) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 27, 2014
Additional disclosure
Options outstanding (in shares)	142,402	198,764
Stock options not included in the calculation of diluted EPS (in shares)	0
Anti-dilutive stock options not included in the computation of diluted EPS (in shares)	0	0
Common Shares issued under DRP and the 2000 and 2008 Employee Plans	52,153	47,422
Value of Common Shares issued under DRP and the 2000 and 2008 Employee Plans	$ 126	$ 292
Dividends paid	$ 8,181	$ 8,155
Quarterly dividends paid, per share of common stock (in dollars per share)	$ 0.224	$ 0.213
Restricted Stock Units
Additional disclosure
Restricted stock units outstanding (in shares)	215,129	226,319
AWR
Additional disclosure
Authorized shares to be repurchased			1,250,000.00
AWR
Additional disclosure
Common Shares repurchased in the open market under DRP and 401(k) Plan		356,769

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Aggregate dividends paid during the period for each share of common stock outstanding.

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Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests.

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