Investments	12 Months Ended
Dec. 31, 2017
Equity Method Investments and Joint Ventures [Abstract]
Investments	Equity Investments In December 2016, the Company acquired a 25.0% equity interest in Ruby Sketch Pty Ltd. (“Ruby Sketch”), an Australian proprietary limited company, for $2.5 million. The Company has accounted for its ownership interest using the equity accounting method and recognized Ruby Sketch investment as an asset at cost. The investment will fluctuate in future periods based on the Company’s allocable share of earnings or losses from the investment which is recognized through earnings. Ruby Sketch develops software that assists in designing residential structures, primarily used in Australia and potentially for the North America market. The Company’s future relationship with Ruby Sketch also could potentially include the specification of the Company’s products in Ruby Sketch's software. The Company has no obligation to make any additional capital contributions to Ruby Sketch.

Investments

12 Months Ended

Dec. 31, 2017

Equity Method Investments and Joint Ventures [Abstract]

Equity Investments

In December 2016, the Company acquired a 25.0% equity interest in Ruby Sketch Pty Ltd. (“Ruby Sketch”), an Australian proprietary limited company, for $2.5 million. The Company has accounted for its ownership interest using the equity accounting method and recognized Ruby Sketch investment as an asset at cost. The investment will fluctuate in future periods based on the Company’s allocable share of earnings or losses from the investment which is recognized through earnings.

Ruby Sketch develops software that assists in designing residential structures, primarily used in Australia and potentially for the North America market. The Company’s future relationship with Ruby Sketch also could potentially include the specification of the Company’s products in Ruby Sketch's software. The Company has no obligation to make any additional capital contributions to Ruby Sketch.