Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended				12 Months Ended
	Jun. 30, 2021		Jun. 30, 2020		Jun. 30, 2021		Jun. 30, 2020		Dec. 31, 2019		Mar. 31, 2021		Dec. 31, 2020		Mar. 31, 2020
Common stock, dividends price per share (in usd per share)	$ 0.135		$ 0.125		$ 0.260		$ 0.250
Accounting Standards Update [Extensible List]									us-gaap:AccountingStandardsUpdate201613Member
Purchase of treasury stock (in shares)							131,035
Stockholders' equity	$ (796,676)		$ (745,489)		$ (796,676)		$ (745,489)		$ (725,263)		$ (768,065)		$ (763,784)		$ (736,922)
Retained Earnings
Stockholders' equity	$ (228,803)	[1],[2]	$ (174,267)	[1],[2]	$ (228,803)	[1],[2]	$ (174,267)	[1],[2]	(162,752)	[2]	$ (208,224)	[1]	$ (191,418)	[2]	$ (168,780)	[1]
Retained Earnings | Cumulative Effect, Period of Adoption, Adjustment
Stockholders' equity									$ 3,395

[1] The Company adopted ASU 2016-13 at December 31, 2020, effective January 1, 2020, adjusting Retained Earnings by a negative $3,395. Prior year periods have not been restated.

[2] The Company adopted ASU 2016-13 at December 31, 2020, effective January 1, 2020, adjusting Retained Earnings by a negative $3,395. Retained earnings for the six months ended June 30, 2020 have not been restated.