Other Assets (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
AMT carryover	$ 403		$ 403		$ 869
Deferred tax assets, valuation allowance, current	0		0		0
Income (loss) from continuing operations before equity method investments, income taxes, extraordinary items, noncontrolling interest, total	3,906	$ 3,684	8,568	$ 7,679	$ 15,900	$ 11,500
State and Local Jurisdiction [Member]
Operating loss carryforwards	$ 22,200		$ 22,200
Minimum [Member] | State and Local Jurisdiction [Member]
Operating loss carryforwards, expiration date			Dec. 31, 2026
Maximum [Member] | State and Local Jurisdiction [Member]
Operating loss carryforwards, expiration date			Dec. 31, 2034