Summary of Significant Accounting and Reporting Policies - Nature of Operations (Details) $ / shares in Units, $ in Thousands, shares in Millions	Jan. 01, 2015 USD ($) $ / shares shares	Dec. 31, 2015 item
Business Acquisition [Line Items]
Number of primary operating business units | item		3
SWS
Business Combination, Description [Abstract]
Conversion of common stock	0.2496
Cash consideration paid per share | $ / shares	$ 1.94
Acquisition price (in dollars per share) | $ / shares	$ 6.92
Aggregate purchase price	$ 349,125
Aggregate purchase price, stock issued | shares	10.1
Aggregate purchase price, cash	$ 78,217
Aggregate purchase price, existing investment	$ 70,282