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CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2018	Dec. 31, 2017
Preferred stock, $0.01 par value, 5,000,000 shares authorized; none issued or outstanding
Par value (in dollars per share)	$ 0.01	$ 0.01
Shares authorized (in shares)	5,000,000	5,000,000
Shares issued (in shares)	0	0
Shares outstanding (in shares)	0	0
Common stock, $0.01 par value, 50,000,000 shares authorized; 23,932,703 and 23,760,434 shares issued on December 31, 2018 and 2017, respectively
Par value (in dollars per share)	$ 0.01	$ 0.01
Shares authorized (in shares)	50,000,000	50,000,000
Shares issued (in shares)	23,932,703	23,760,434
Treasury stock, at cost, 10,116,459 and 9,702,874 shares on December 31, 2018 and 2017, respectively
Treasury stock (in shares)	10,116,459	9,702,874

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