Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Preferred Stock, Shares Authorized	$ 0.01	$ 0.01
Preferred Stock, Value, Outstanding	5,000,000	5,000,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common Stock, Shares, Issued, Acquisitions	122,803,029	122,791,729
Equity Instruments Other than Options, Nonvested, Number	1,476,132	1,211,951
Treasury Stock, Shares	1,519,360	1,378,002