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Subsequent Events	6 Months Ended
Subsequent Events	Jun. 30, 2015
Subsequent Events [Abstract]
Subsequent Events	K. Subsequent Events From July 1, 2015 to August 5, 2015, the Company repurchased 44,800 shares at $68.23 per share. On August 4, 2015, the Board of Directors increased the authorization under the Stock Repurchase Program by an additional 500,000 shares. As a result, there are 814,502 shares available to be repurchased under this existing buyback plan at August 5, 2015. On August 4, 2015, the Board of Directors declared its regular quarterly dividend of $0.07 per share to all of its shareholders, payable on September 29, 2015 to shareholders of record on September 15, 2015.