Condensed Consolidated Statements of Stockholder's Equity - USD ($) $ in Thousands		Total	Calculated under revenue guidance in effect before topic 606	Difference between revenue guidance in effect before and after ASC 606	Common stock	Common stock Calculated under revenue guidance in effect before topic 606	Additional paid-in capital	Additional paid-in capital Calculated under revenue guidance in effect before topic 606	Accumulated other comprehensive income (loss)	Accumulated other comprehensive income (loss) Calculated under revenue guidance in effect before topic 606	Retained earnings	Retained earnings Calculated under revenue guidance in effect before topic 606	Retained earnings Difference between revenue guidance in effect before and after ASC 606
Beginning balance at Dec. 31, 2016		$ 2,012,321			$ 7,293		$ 863,031		$ 235,875		$ 906,122
Increase (Decrease) in Stockholder's Equity
Net income		131,237									131,237
Other comprehensive loss, net of income taxes		185,055							185,055
Dividends		(145,301)									(145,301)
Capital contribution	[1]	76,429					76,429
Capital contribution - stock-based compensation		1,156					1,156
Ending balance at Sep. 30, 2017		2,260,897			7,293		940,616		420,930		892,058
Beginning balance at Jun. 30, 2017									406,139
Increase (Decrease) in Stockholder's Equity
Net income		46,581
Other comprehensive loss, net of income taxes		14,791
Ending balance at Sep. 30, 2017		2,260,897			7,293		940,616		420,930		892,058
Beginning balance at Dec. 31, 2017		2,449,589	$ 2,449,589		7,320	$ 7,320	949,520	$ 949,520	440,957	$ 440,957		$ 1,051,792
Beginning balance (ASC 606) at Dec. 31, 2017		2,482,541		$ 32,952							1,084,744		$ 32,952
Increase (Decrease) in Stockholder's Equity
Net income		218,668									218,668
Other comprehensive loss, net of income taxes		(583,313)							(583,313)
Dividends		(129,895)									(129,895)
Capital contribution	[2]	2,514					2,514
Capital contribution - stock-based compensation		648					648
Ending balance at Sep. 30, 2018		1,991,163			7,320		952,682		(142,356)		1,173,517
Beginning balance at Jun. 30, 2018									(51,100)
Increase (Decrease) in Stockholder's Equity
Net income		71,382
Other comprehensive loss, net of income taxes		(91,256)
Ending balance at Sep. 30, 2018		$ 1,991,163			$ 7,320		$ 952,682		$ (142,356)		$ 1,173,517

[1] In May 2017, the Company received a capital contribution from its parent, GWL&A Financial Inc., in the amount of $76,429. No additional shares of the Company were issued in relation to this contribution.

[2] In February 2018, the Company received a capital contribution from its parent, GWL&A Financial Inc., in the amount of $848. In May 2018, an additional capital contribution was received in the amount of $840. In August 2018, an additional capital contribution was received in the amount of $826. No additional shares of the Company were issued in relation to these contributions.