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		84,652									84,652
Other comprehensive loss, net of income taxes		170,264							170,264
Dividends		(137,301)									(137,301)
Capital contribution	[1]	76,429					76,429
Capital contribution - stock-based compensation		925					925
Ending balance at Jun. 30, 2017		2,207,290			7,293		940,385		406,139		853,473
Beginning balance at Mar. 31, 2017									299,854
Increase (Decrease) in Stockholder's Equity
Net income		49,824
Other comprehensive loss, net of income taxes		106,285
Ending balance at Jun. 30, 2017		2,207,290			7,293		940,385		406,139		853,473
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		147,286									147,286
Other comprehensive loss, net of income taxes		(492,057)							(492,057)
Dividends		(99,894)									(99,894)
Capital contribution	[2]	1,688					1,688
Capital contribution - stock-based compensation		432					432
Ending balance at Jun. 30, 2018		2,039,996			7,320		951,640		(51,100)		1,132,136
Beginning balance at Mar. 31, 2018									137,775
Increase (Decrease) in Stockholder's Equity
Net income		98,628
Other comprehensive loss, net of income taxes		(188,875)
Ending balance at Jun. 30, 2018		$ 2,039,996			$ 7,320		$ 951,640		$ (51,100)		$ 1,132,136

[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. No additional shares of the Company were issued in relation to these contributions.