Significant Accounting Policies and Recently Issued Accounting Pronouncement - Long-lived Assets (Details)	12 Months Ended
	Dec. 31, 2018
Long-lived asset disclosures
Period of payment default	3 months
Furniture, Fixtures, Equipment and Building Improvements | Minimum
Long-lived asset disclosures
Estimated useful lives	5 years
Furniture, Fixtures, Equipment and Building Improvements | Maximum
Long-lived asset disclosures
Estimated useful lives	7 years
Capitalized Software | Minimum
Long-lived asset disclosures
Estimated useful lives	3 years
Capitalized Software | Maximum
Long-lived asset disclosures
Estimated useful lives	7 years