Schedule II - Condensed Financial Information of Registrant - Parent Company Only - Cash Flow Statement (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Activities:
Net income (loss) attributable to Common Stockholders	$ 4,147	$ (1,457)	$ 11,746	$ 3,925	$ 165	$ (618)	$ 826	$ 23,560	$ 18,361	$ 23,933	$ 3,604
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Net cash provided by (used in) operating activities									23,742	57,724	46,919
Investing Activities:
Dividends paid									5,502	4,781	3,499
Repurchase of common stock									(9,085)	(14,111)	(7,300)
Net cash provided by (used in) financing activities									36,928	(2,003)	(194,406)
Net increase (decrease) in cash, cash equivalents and restricted cash									52,343	(53,386)	65,288
Cash, cash equivalents and restricted cash – beginning of period				96,524				142,237	96,524	142,237	74,258
Cash, cash equivalents and restricted cash – end of period	144,590				96,524				144,590	96,524	142,237
Parent Company
Operating Activities:
Net income (loss) attributable to Common Stockholders									18,361	23,933	3,604
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Equity in earnings of subsidiaries									18,364	23,816	3,345
Changes in other operating assets and liabilities									(583)	4,772	3,805
Net cash provided by (used in) operating activities									(586)	4,889	4,064
Investing Activities:
Cash dividends received by Parent									14,587	4,781	3,499
Dividends paid									(5,502)	(4,781)	(3,499)
Repurchase of common stock									(9,085)	0	0
Net cash provided by (used in) financing activities									0	(4,781)	(3,499)
Net increase (decrease) in cash, cash equivalents and restricted cash									(586)	108	565
Cash, cash equivalents and restricted cash – beginning of period				$ 673				$ 565	673	565	0
Cash, cash equivalents and restricted cash – end of period	$ 87				$ 673				87	673	565
Cash (received) paid for income taxes									$ 2,168	$ (5,915)	$ 14