Significant Accounting Policies (Detail Textuals)	1 Months Ended	12 Months Ended
	Jan. 23, 2018 $ / shares	Dec. 31, 2017 $ / shares shares	Dec. 31, 2016 $ / shares shares	Dec. 31, 2015 Customer
Significant Accounting Policies [Line Items]
Common stock, shares authorized (in shares) | shares		349,000,000	349,000,000
Common stock, par value (in dollars per share)		$ 0.10	$ 0.10
Number of votes each common shareholders entitled to provide		one vote
Preferred stock, shares authorized (in shares) | shares		1,000,000	1,000,000
Preferred stock, par value (in dollars per share)		$ 0.10	$ 0.10
Dividend declared
Significant Accounting Policies [Line Items]
Dividends payable, amount per share		$ 0.07
Subsequent event | Dividend declared
Significant Accounting Policies [Line Items]
Percentage of increased dividends payable	43.00%
Dividends payable, amount per share	$ 0.10
Dividends payable, date declared	Jan. 23, 2018
Dividends payable, date to be payable	Mar. 09, 2018
Dividends payable, date of record	Feb. 09, 2018
Customer concentration risk | Revenue
Significant Accounting Policies [Line Items]
Number of customer | Customer				1
Description of customers accounted for concentration of credit risk		no customers that accounted for more than 10 percent of the Company's revenues	no customers that accounted for more than 10 percent of the Company's revenues	one customer accounted for 23 percent of revenues
Customer concentration risk benchmark percentage		10	10	23
Customer concentration risk | Accounts receivable
Significant Accounting Policies [Line Items]
Description of customers accounted for concentration of credit risk		no customers that accounted for more than 10 percent of accounts receivable	no customers that accounted for more than 10 percent of accounts receivable
Customer concentration risk benchmark percentage		10	10