Basis of Presentation and Critical Accounting Policies (Details) - USD ($) $ / shares in Units, $ in Thousands	Jan. 29, 2015	Dec. 18, 2015
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Number of shares issued (in shares)	13,100,360
Gross proceeds from stock offering	$ 121,700
Proceeds from initial public offering	117,600
Capital contribution to subsidiary	58,400
Percentage of shares to be purchased		8.00%
Number of shares to be purchased (in shares)		1,048,029
Contributions to charitable organization
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Value of charitable consideration, cash portion	$ 400
IPO
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Number of shares issued (in shares)	12,167,000
Share price (in dollars per share)	$ 10.00
Secondary Offering | Contributions to charitable organization
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Number of shares issued (in shares)	933,360