Capital Stock (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Shares of common stock authorized	100,000,000	100,000,000
Shares issued and outstanding	48,400,000	47,800,000
Shares of Common Stock for Pension Plan Contribution		361,446
Value of Shares of Common Stock for Defined Benefit Plan Contribution		$ 9.0
Date of shares issued for stock contribution		Mar. 06, 2012
Discount due to lack of marketability		2.40%
Closing share price		$ 25.51
Regular Quarterly Dividend Date Declared	Jan. 16, 2014
Regular Quarterly Dividend Payable - Amount per Share	$ 0.1
Regular Quarterly Dividend Date Payable	Mar. 03, 2014
Amount of Shares of Preferred Stock Authorized to be Issued	2,000,000
Common Stock, Value of Shelf Registration		$ 150
Common Stock Shares Available under Shelf Registration		141,500,000
Par Value of Preferred Stock Authorized to be Issued	$ 10