Acquisition of RSI Communities - Summary of Unaudited Pro Forma Amounts of RSI Communities Acquisition (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
South Pacific Financial Corporation [Member]
Business Acquisition [Line Items]
Operating revenues	$ 465,469	$ 519,452	$ 921,333	$ 892,820
Net income available to common stockholders	$ 10,271	$ 22,532	$ 17,147	$ 31,260
Income per share - basic (in USD per share)	$ 0.27	$ 0.59	$ 0.45	$ 0.82
Income per share - diluted (in USD per share)	$ 0.26	$ 0.57	$ 0.44	$ 0.79
RSI Communities
Business Acquisition [Line Items]
Operating revenues		$ 519,452		$ 933,255
Net income available to common stockholders		$ 22,455		$ 30,587
Income per share - basic (in USD per share)		$ 0.59		$ 0.81
Income per share - diluted (in USD per share)		$ 0.57		$ 0.77